Materials Science › Polymers and Plastics

Synthesis and properties of polymers

Works Count: 89024

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This cluster of papers explores advancements in polyimide materials, including the use of elemental sulfur as a feedstock, synthesis of high refractive index and low dielectric constant polymers, applications in space technology, development of optically transparent films, and utilization in lithium-sulfur batteries.

Keywords

Polyimides; Elemental Sulfur; High Refractive Index; Low Dielectric Constant; Inverse Vulcanization; Fluorinated Polymers; Space Applications; Thermal Stability; Optically Transparent Films; Lithium-Sulfur Batteries

Epoxy resins. Chemistry and technology

1974-05-01

C. A. May

Handbook of Adhesive Technology, Third Edition

2017-12-15

A. Pizzi , K. L. Mittal

Part 1 Review Topics Historical Development of Adhesives and Adhesive Bonding Fundamental Aspects Theories and Mechanisms of Adhesion Application of Plasma Technology for Improved Adhesion of Materials Silane and Other … Part 1 Review Topics Historical Development of Adhesives and Adhesive Bonding Fundamental Aspects Theories and Mechanisms of Adhesion Application of Plasma Technology for Improved Adhesion of Materials Silane and Other Adhesion Promoters in Adhesive Technology Testing of Adhesives Physical Testing of Pressure-Sensitive Adhesive Systems Durability of Adhesive Joints Analysis of Adhesives Fracture of Adhesive-Bonded Wood Joints Spectroscopic Techniques in Adhesive Bonding Ultraviolet Stabilization of Adhesives. Part 2: Adhesive Classes Protein Adhesives for Wood Animal Glues and Adhesives Carbohydrate Polymers as Adhesives Natural Rubber-Based Adhesives Polysulfide Sealants and Adhesives Phenolic Resin Adhesives Natural Phenolic Adhesives - Tannin, Lignin Resorcinol Adhesives Urea-Formaldehyde Adhesives Melamine-Formaldehyde Adhesives Polyurethane Adhesives. Part 3 Applications of Adhesives: Adhesives in the Electronics Industry Adhesives in the Wood Industry Bioadhesives in Drug Delivery Bonding Materials and Techniques in Dentistry Adhesives in the Automotive Industry.

Chemistry and Technology of Cyanate Ester Resins

1994-01-01

Ian Hamerton

Rechargeable Lithium Sulfur Battery

2003-01-01

Sang-Eun Cheon , Ki-Seok Ko , Jihoon Cho +3 more

In this paper, the structural change of the sulfur cathode during the electrochemical reaction of a lithium sulfur battery employing 0.5 M -tetra(ethylene glycol) dimethyl ether (TEGDME) was studied by … In this paper, the structural change of the sulfur cathode during the electrochemical reaction of a lithium sulfur battery employing 0.5 M -tetra(ethylene glycol) dimethyl ether (TEGDME) was studied by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), and wave dispersive spectroscopy (WDS). The discharge process of the lithium sulfur cell could be divided in the first discharge region (2.4-2.1 V) where the reduction of elemental sulfur to form soluble polysulfides and further reduction of the soluble polysulfide occur, and the second discharge region (2.1-1.5 V) where the soluble polysulfides are reduced to form a nonuniform solid film covered over the carbon matrix. It was also found that the charge of lithium sulfur cell leads to the conversion from to the soluble polysulfide, resulting in the removal of layer formed on carbon matrix. However, the oxidization of the soluble polysulfide to solid sulfur hardly occurs and few are left on carbon matrix even at 100% depth of charge. © 2003 The Electrochemical Society. All rights reserved.

The Use, Design, Synthesis, and Properties of High Performance/High Temperature Polymers: An Overview

2003-03-01

P. M. Hergenrother

An overview of the definition and development of, factors that contribute to, applications and markets for and the design of high performance/high temperature polymers is presented. Of the many families … An overview of the definition and development of, factors that contribute to, applications and markets for and the design of high performance/high temperature polymers is presented. Of the many families of high performance/high temperature polymers known, the most popular families consisting of polyimides, polyarylene ethers and phenylethynyl-terninated oligomers are used to demonstrate the basic principles in polymer development. Chemical structure/property relationships are used to show how polymers can be designed with a unique combination of properties. The estimated worldwide market for high temperature polymers in 2000 was 206,700,000 kgs constituting $4.36B with polyimides comprising 3,982,000 kgs or $1 .07B (24% of the dollar value). With an improvement in the world economy, this market is predicted to grow substantially

A New, General Synthetic Method for the Preparation of Linear Poly‐p‐xylylenes

1966-12-01

William F. Gorham

Abstract A new, general synthetic route to poly‐ p ‐xylylene and substituted poly‐ p ‐xylylenes is described. The key intermediate in the new process is di‐ p ‐xylylene [(2,2) p … Abstract A new, general synthetic route to poly‐ p ‐xylylene and substituted poly‐ p ‐xylylenes is described. The key intermediate in the new process is di‐ p ‐xylylene [(2,2) p ‐cyclophane]. It has been found that di‐ p ‐xylylene is quantitatively cleaved by vacuum vapor‐phase pyrolysis at 600°C. to two molecules of p ‐xylylene. p ‐Xylylene spontaneously polymerizes on condensation to form high molecular weight, linear poly‐ p ‐xylylene. The conversion of di‐ p ‐xylylene to poly‐ p ‐xylylene is quantitative. The process is adaptable to the preparation of a wide variety of substituted poly‐ p ‐xylylenes by pyrolysis of ring‐substituted di‐ p ‐xylylenes and polymerization of the resultant substituted p ‐xylylenes. Many of these polymers are not attainable by any other route. All are linear and free of crosslinking. Evidence supporting the proposed mechanism of pyrolytic cleavage of every molecule of di‐ p ‐xylylene to two molecules of p ‐xylylene is presented. Tough, transparent polymeric films are obtained from the process when the polymerization of the p ‐xylylenes is conducted on glass or metal surfaces. Outstanding combinations of physical, electrical, and chemical properties are displayed by poly‐ p ‐xylylene, polychloro‐ p ‐xylylene, and other substituted polymers. A comparison of the relative merits of the original Szwarc route and the new di‐ p ‐xylylene route to poly‐p‐xylylenes is presented.

Phase behavior of polystyrene, poly(2,6-dimethyl-1,4-phenylene oxide), and their brominated derivatives

1983-05-01

R. P. Kambour , John T. Bendler , R. C. Bopp

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase behavior of polystyrene, poly(2,6-dimethyl-1,4-phenylene oxide), and their brominated derivativesRoger P. Kambour, John T. Bendler, and R. C. BoppCite this: Macromolecules 1983, 16, 5, 753–757Publication Date (Print):May … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase behavior of polystyrene, poly(2,6-dimethyl-1,4-phenylene oxide), and their brominated derivativesRoger P. Kambour, John T. Bendler, and R. C. BoppCite this: Macromolecules 1983, 16, 5, 753–757Publication Date (Print):May 1, 1983Publication History Published online1 May 2002Published inissue 1 May 1983https://pubs.acs.org/doi/10.1021/ma00239a010https://doi.org/10.1021/ma00239a010research-articleACS PublicationsRequest reuse permissionsArticle Views965Altmetric-Citations454LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Crosslinking polyimides for membrane applications: A review

2012-11-21

Katrien Vanherck , Guy Koeckelberghs , Ivo F.J. Vankelecom

Ferroelectric Materials and their Applications

1992-05-01

F. R. Cruickshank

"Ferroelectric Materials and their Applications." Journal of Modern Optics, 39(5), pp. 1162–1163 "Ferroelectric Materials and their Applications." Journal of Modern Optics, 39(5), pp. 1162–1163

High-performance aromatic polyamides

2009-09-26

José M. García , Félix C. García , Felipe Serna +1 more

Photophysics, photochemistry, and optical properties of polyimides

2001-03-01

Masatoshi Hasegawa , Kyoji Horie

Fluorinated high-performance polymers: Poly(arylene ether)s and aromatic polyimides containing trifluoromethyl groups

2010-04-10

Mahua G. Dhara , Susanta Banerjee

Structural Studies of Polyethers, (-(CH2)m-O-)n. X. Crystal Structure of Poly(ethylene oxide)

1973-09-01

Yasuhiro Takahashi , Hiroyuki Tadokoro

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural Studies of Polyethers, (-(CH2)m-O-)n. X. Crystal Structure of Poly(ethylene oxide)Yasuhiro Takahashi and Hiroyuki TadokoroCite this: Macromolecules 1973, 6, 5, 672–675Publication Date (Print):September 1, 1973Publication History Published … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural Studies of Polyethers, (-(CH2)m-O-)n. X. Crystal Structure of Poly(ethylene oxide)Yasuhiro Takahashi and Hiroyuki TadokoroCite this: Macromolecules 1973, 6, 5, 672–675Publication Date (Print):September 1, 1973Publication History Published online1 May 2002Published inissue 1 September 1973https://pubs.acs.org/doi/10.1021/ma60035a005https://doi.org/10.1021/ma60035a005research-articleACS PublicationsRequest reuse permissionsArticle Views3487Altmetric-Citations724LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-AlertscloseSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts

Low dielectric constant polymers for microelectronics

2001-02-01

G. Maier

Thermally stable polymers

1968-01-01

C. S. Marvel

Abstract Abstract

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Regiocontrolled Synthesis of Poly(3-alkylthiophenes) Mediated by Rieke Zinc: Their Characterization and Solid-State Properties

1995-01-01

Tian‐An Chen , Xiaoming Wu , Reuben D. Rieke

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRegiocontrolled Synthesis of Poly(3-alkylthiophenes) Mediated by Rieke Zinc: Their Characterization and Solid-State PropertiesTian-An Chen, Xiaoming Wu, and Reuben D. RiekeCite this: J. Am. Chem. Soc. 1995, 117, … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRegiocontrolled Synthesis of Poly(3-alkylthiophenes) Mediated by Rieke Zinc: Their Characterization and Solid-State PropertiesTian-An Chen, Xiaoming Wu, and Reuben D. RiekeCite this: J. Am. Chem. Soc. 1995, 117, 1, 233–244Publication Date (Print):January 1, 1995Publication History Published online1 May 2002Published inissue 1 January 1995https://pubs.acs.org/doi/10.1021/ja00106a027https://doi.org/10.1021/ja00106a027research-articleACS PublicationsRequest reuse permissionsArticle Views10856Altmetric-Citations1389LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-AlertscloseSupporting Info (2)»Supporting Information Supporting Information Get e-Alerts

Synthesis and properties of polyimide-clay hybrid films

1997-08-01

Kazuhisa Yano , Arimitsu Usuki , Akane Okada

Polyimide-clay hybrid films with four different sizes of clay minerals have been synthesized to investigate the effect of the size of clay minerals to the properties of the hybrids. Hectrite, … Polyimide-clay hybrid films with four different sizes of clay minerals have been synthesized to investigate the effect of the size of clay minerals to the properties of the hybrids. Hectrite, saponite, montmorillonite, and synthetic mica were used as clay minerals. Those clays consist of stacked silicate sheets about 460 Å (hectrite), 1650 Å (saponite), 2180 Å (montmorillonite), and 12300 Å (synthetic mica) in length, 10 Å in thickness. The longer the length of clay mineral was, the more effectively properties of polyimide were improved. In the case of polyimide-mica hybrid, only 2 wt % addition of synthetic mica brought permeability coefficients of water vapor to value less than one-tenth of that of ordinary unfilled polyimide, and thermal expansion coefficient was lowered at the level of 60% of the original one. © 1997 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 35: 2289–2294, 1997

Synthesis and properties of polyimide–clay hybrid

1993-09-01

Kazuhisa Yano , Arimitsu Usuki , Akane Okada +2 more

Abstract A polyimide hybrid with montmorillonite clay mineral has been synthesized from a dimethylacetamide (DMAC) solution of poly(amic acid) and a DMAC dispersion of montmorillonite intercalated with an ammonium salt … Abstract A polyimide hybrid with montmorillonite clay mineral has been synthesized from a dimethylacetamide (DMAC) solution of poly(amic acid) and a DMAC dispersion of montmorillonite intercalated with an ammonium salt of dodecylamine. Montmorillonite consists of stacked silicate sheets about 2000 Å in length, 10 Å in thickness. In this hybrid, montmorillonite is dispersed homogeneously into the polyimide matrix and oriented parallel to the film surface. Thanks to this special structure, this hybrid showed excellent gas barrier properties. Only 2 wt % addition of montmorillonite brought permeability coefficients of various gases to values less than half of those of ordinary polyimide. Furthermore, this hybrid had low thermal expansion coefficient. © 1993 John Wiley & Sons, Inc.

Synthesis and properties of polyaryletherketones

1981-08-01

T.E. Attwood , P. C. Dawson , Jason L. Freeman +3 more

Solutions of Long Chain Compounds

1941-05-01

Maurice L. Huggins

First Page First Page

The morphology of poly(aryl-ether-ether-ketone)

1983-08-01

D.J. Blundell , Benjamin Osborn

Advanced polyimide materials: Syntheses, physical properties and applications

2012-03-01

Der‐Jang Liaw , Kung-Li Wang , Ying‐Chi Huang +3 more

Solution studies of cellulose in lithium chloride and N,N-dimethylacetamide

1985-12-01

Charles L. McCormick , Peter Callais , Brewer H. Hutchinson

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolution studies of cellulose in lithium chloride and N,N-dimethylacetamideCharles L. McCormick, Peter A. Callais, and Brewer H. Hutchinson Jr.Cite this: Macromolecules 1985, 18, 12, 2394–2401Publication Date (Print):December … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolution studies of cellulose in lithium chloride and N,N-dimethylacetamideCharles L. McCormick, Peter A. Callais, and Brewer H. Hutchinson Jr.Cite this: Macromolecules 1985, 18, 12, 2394–2401Publication Date (Print):December 1, 1985Publication History Published online1 May 2002Published inissue 1 December 1985https://pubs.acs.org/doi/10.1021/ma00154a010https://doi.org/10.1021/ma00154a010research-articleACS PublicationsRequest reuse permissionsArticle Views4771Altmetric-Citations564LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Polymers with Upper Critical Solution Temperature in Aqueous Solution

2012-09-07

Jan Seuring , Seema Agarwal

Abstract This review focuses on polymers with upper critical solution temperature (UCST) in water or electrolyte solution and provides a detailed survey of the yet few existing examples. A guide … Abstract This review focuses on polymers with upper critical solution temperature (UCST) in water or electrolyte solution and provides a detailed survey of the yet few existing examples. A guide for synthetic chemists for the design of novel UCST polymers is presented and possible handles to tune the phase transition temperature, sharpness of transition, hysteresis, and effectiveness of phase separation are discussed. This review tries to answer the question why polymers with UCST remained largely underrepresented in academic as well as applied research and what requirements have to be fulfilled to make these polymers suitable for the development of smart materials with a positive thermoresponse.

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Molecular Vibrations of Three Crystal Forms of Poly(vinylidene fluoride)

1975-03-01

Masamichi Kobayashi , Kohji Tashiro , Hiroyuki Tadokoro

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular Vibrations of Three Crystal Forms of Poly(vinylidene fluoride)Masamichi Kobayashi, Kohji Tashiro, and Hiroyuki TadokoroCite this: Macromolecules 1975, 8, 2, 158–171Publication Date (Print):March 1, 1975Publication History Published … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular Vibrations of Three Crystal Forms of Poly(vinylidene fluoride)Masamichi Kobayashi, Kohji Tashiro, and Hiroyuki TadokoroCite this: Macromolecules 1975, 8, 2, 158–171Publication Date (Print):March 1, 1975Publication History Published online1 May 2002Published inissue 1 March 1975https://pubs.acs.org/doi/10.1021/ma60044a013https://doi.org/10.1021/ma60044a013research-articleACS PublicationsRequest reuse permissionsArticle Views3418Altmetric-Citations713LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

The use of elemental sulfur as an alternative feedstock for polymeric materials

2013-04-12

Woo Jin Chung , Jared J. Griebel , Eui‐Tae Kim +7 more

Poly(aryl ethers) by nucleophilic aromatic substitution. I. Synthesis and properties

1967-09-01

R. N. JOHNSON , A. G. Farnham , R. A. Clendinning +2 more

Abstract A series of new aromatic polyethers have been prepared by solution condensation polymerization. The synthesis involves the condensation of a dialkali metal salt of a dihydric phenol with an … Abstract A series of new aromatic polyethers have been prepared by solution condensation polymerization. The synthesis involves the condensation of a dialkali metal salt of a dihydric phenol with an “activated” or negatively substituted aromatic dihalide in an anhydrous dipolar aprotic solvent at elevated temperatures. The reaction is rapid, free of side reactions, and yields polymers of excellent color. Bakelite polysulfone can be prepared in this manner by reaction of the disodium salt of bisphenol A with 4,4′‐dichlorodiphenyl sulfone in dimethyl sulfoxide (DMSO). Only dipolar aprotic solvents are useful for conducting the polymerization. Of these, DMSO and Sulfolane (tetrahydrothiophene 1,1‐dioxide) are the most effective. Water or other competing nucleophiles must be absent if high molecular weight is to be obtained. Besides providing the necessary solubility, this highly polar solvent is believed to be essential in providing the rapid polymerization rates observed. The rates are further found to depend on the basicity of the bisphenol salt and upon the electron‐withdrawing power of the activating group in the dihalide. As is usual for this type of reaction, the difluorides are found to be more reactive than the corresponding dichlorides. Most of the polyethers are amorphous, rigid, tough thermoplastics with high second‐order transitions ( T g ). Thermal stability and electrical properties are noteworthy. These and other properties are described for polysulfone, and glass transitions are given for a selected list of the other polyethers.

Studies on reactions of the N‐phosphonium salts of pyridines. XIV. Wholly aromatic polyamides by the direct polycondensation reaction by using phosphites in the presence of metal salts

1975-06-01

Noboru Yamazaki , Makoto Matsumoto , Fukuji Higashi

Abstract Poly‐ p ‐benzamide of high molecular weight (η inh = ∼ in H 2 SO 4 ) was obtained by the direct polycondensation reaction of p ‐aminobenzoic acid ( … Abstract Poly‐ p ‐benzamide of high molecular weight (η inh = ∼ in H 2 SO 4 ) was obtained by the direct polycondensation reaction of p ‐aminobenzoic acid ( p ‐ABA) by means of diphenyl and triaryl phosphites in N ‐methylpyrrolidone (NMP)‐pyridine solution containing lithium and calcium chlorides. Molecular weight of polymer varied with the amount of these salts, showing maximum values at the concentration of about 4 wt‐% of LiCl or about 8 wt‐% of CaCl 2 in the reaction mixture. The reaction temperature at around 80°C gave a polymer of the highest viscosity. The polycondensation reaction was also affected by monomer concentration, solvents, and tertiary amines like pyridine. Similarly, aromatic polyamides with high molecular weight (η inh values up to 1.34 in H 2 SO 4 ) were prepared from isophthalic acid and aromatic diamines, whereas terephthalic acid gave only low‐viscosity polymers.

Polybenzimidazoles, new thermally stable polymers

1961-04-01

H. A. Vogel , C. S. Marvel

Abstract Wholly aromatic polybenzimidazoles were synthesized from aromatic tetraamines and difunctional aromatic acids and characterized as new thermally stable polymers. The melt polycondensation of aromatic tetraamines and the diphenyl esters … Abstract Wholly aromatic polybenzimidazoles were synthesized from aromatic tetraamines and difunctional aromatic acids and characterized as new thermally stable polymers. The melt polycondensation of aromatic tetraamines and the diphenyl esters of aromatic dicarboxylic acids was developed as a general procedure of wide applicability. Polybenzimidazoles containing mixed aromatic units in the chain backbone were prepared from 3,3′‐diaminobenzidine, 1,2,4,5‐tetraaminobenzene and a variety of aromatic diphenyl dicarboxylates. Phenyl 3,4‐diaminobenzoate could also be polymerized by melt condensation to give poly‐2,5(6)‐benzimidazole. The polymers were characterized by a high degree of stability, showing great resistance to treatment with hydrolytic media and an ability to withstand continued exposure to elevated temperatures. Most of the polymers were infusible, but some had melting points above about 400°C. Many of the polymers exhibited no change in properties on being heated to 550°C. and showed a weight loss of less than 5% when heated under nitrogen for several hours to 600°C. The polymers were soluble in concentrated sulfuric acid and formic acid, producing stable solutions. Many of the polymers were soluble in dimethyl sulfoxide and some also in dimethylformamide. The inherent viscosities of a number of polymers in 0.5% dimethyl sulfoxide solution ranged from approximately 0.4 to 1.1. The higher polymers could be cast into stiff and tough films from formic acid and dimethyl sulfoxide solutions.

Metallopolymers: New Multifunctional Materials

2007-11-05

George R. Whittell , Ian Manners

Abstract Since the mid 1990s soluble, well‐characterized high molecular weight metal‐containing and metallosupramolecular polymers have become readily available for the first time, even in some cases, with narrow molecular weight … Abstract Since the mid 1990s soluble, well‐characterized high molecular weight metal‐containing and metallosupramolecular polymers have become readily available for the first time, even in some cases, with narrow molecular weight distributions and controlled architectures such as block copolymers. This has led to a rapidly expanding interest in their properties and uses. The review provides a survey of the range of applications for these new materials, which combine the processing advantages of polymers with the functionality provided by the presence of metal centers.

High refractive index polymers: fundamental research and practical applications

2009-01-01

Jingang Liu , Mitsuru Ueda

Rapid developments in advanced photonic devices have led to the increasing exploration of high refractive index (high-n) materials, particularly high-refractive-index polymers (HRIP). High refractive indices have been achieved either by … Rapid developments in advanced photonic devices have led to the increasing exploration of high refractive index (high-n) materials, particularly high-refractive-index polymers (HRIP). High refractive indices have been achieved either by introducing substituents with high molar refractions to make intrinsic HRIPs or by combining high-nnanoparticles with polymer matrixes to make HRIP nanocomposites. For intrinsic HRIPs, aromatic rings, sulfur-containing groups, halogens except fluorine and organometallic moieties are often utilized to increase their refractive indices. However, their upper n limitation is usually below 1.80. Incorporation of high-nnanoparticles into polymers seems to be a more promising strategy to achieve a refractive index higher than 1.80; however, the obtained organic–inorganic hybrid materials sometimes suffer from poor storage stability, higher optical loss and poor processability. Besides the refractive index, optical dispersion (Abbe number), birefringence and optical transparency are often involved in designing HRIPs for practical optical fabrications. Therefore, research of HRIPs is becoming an interdisciplinary subject. This feature article reviews recent developments in optical HRIPs and their typical applications in high-tech fields.

Dielectric Materials and Applications.

1955-03-01

Charles P. Smyth

ADVERTISEMENT RETURN TO ISSUEPREVArticleDielectric Materials and Applications.Charles P. SmythCite this: J. Am. Chem. Soc. 1955, 77, 6, 1714Publication Date (Print):March 1, 1955Publication History Published online1 May 2002Published inissue 1 March … ADVERTISEMENT RETURN TO ISSUEPREVArticleDielectric Materials and Applications.Charles P. SmythCite this: J. Am. Chem. Soc. 1955, 77, 6, 1714Publication Date (Print):March 1, 1955Publication History Published online1 May 2002Published inissue 1 March 1955https://pubs.acs.org/doi/10.1021/ja01611a117https://doi.org/10.1021/ja01611a117research-articleACS PublicationsRequest reuse permissionsArticle Views693Altmetric-Citations-LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Stille Polycondensation for Synthesis of Functional Materials

2011-02-11

Bridget Carsten , Feng He , Hae Jung Son +2 more

ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTStille Polycondensation for Synthesis of Functional MaterialsBridget Carsten, Feng He, Hae Jung Son, Tao Xu, and Luping Yu*View Author Information Department of Chemistry and the James Franck … ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTStille Polycondensation for Synthesis of Functional MaterialsBridget Carsten, Feng He, Hae Jung Son, Tao Xu, and Luping Yu*View Author Information Department of Chemistry and the James Franck Institute, the University of Chicago, 929 E. 57th Street, Chicago, Illinois 60637, United States*E-mail: [email protected]Cite this: Chem. Rev. 2011, 111, 3, 1493–1528Publication Date (Web):February 11, 2011Publication History Received22 September 2010Published online11 February 2011Published inissue 9 March 2011https://pubs.acs.org/doi/10.1021/cr100320whttps://doi.org/10.1021/cr100320wreview-articleACS PublicationsCopyright © 2011 American Chemical SocietyRequest reuse permissionsArticle Views12836Altmetric-Citations634LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Catalysts,Ligands,Monomers,Polymers,Solvents Get e-Alerts

Physical Properties of High Temperature Superconductors I

1990-08-01

H.W. Weber

Mechanische Relaxationserscheinungen an Hochpolymeren

1953-12-01

Klaus R. Schmieder , Karl H. Wolf

Solid-State Structures of Hydrogen-Bonded Tapes Based on Cyclic Secondary Diamides

1994-12-01

John C. MacDonald , George M. Whitesides

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolid-State Structures of Hydrogen-Bonded Tapes Based on Cyclic Secondary DiamidesJohn C. MacDonald and George M. WhitesidesCite this: Chem. Rev. 1994, 94, 8, 2383–2420Publication Date (Print):December 1, 1994Publication … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolid-State Structures of Hydrogen-Bonded Tapes Based on Cyclic Secondary DiamidesJohn C. MacDonald and George M. WhitesidesCite this: Chem. Rev. 1994, 94, 8, 2383–2420Publication Date (Print):December 1, 1994Publication History Published online1 May 2002Published inissue 1 December 1994https://pubs.acs.org/doi/10.1021/cr00032a007https://doi.org/10.1021/cr00032a007research-articleACS PublicationsRequest reuse permissionsArticle Views1966Altmetric-Citations765LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Polyimides

1991-08-01

C. E. Sroog

Polyimides

1984-01-01

K. L. Mittal

Polyimides

1990-01-01

Doug Wilson , H. Stenzenberger , P. M. Hergenrother

Thermosetting Polymers

2002-02-20

Jean‐Pierre Pascault , Henry Sautereau , J. Verdu +1 more

Aromatic interactions

2001-01-01

Christopher A. Hunter , Kevin R. Lawson , Julie Perkins +1 more

Covering: 1950–2000. Covering: 1950–2000.

Adhesion and Adhesives

1987-01-01

A. J. Kinloch

Ferroelectric Materials and their Applications

1991-01-01

Review of: "Oligophenylene vanillin (silicon/germanium) structure"

2023-11-08

Carlos Anthony Sanchez

View PDF Chat

Extended Linear Chain Compounds

1982-01-01

Joel S. Miller

Polyimides: Synthesis, characterization and applications

1982-10-01

K. L. Mittal

Fluorinated trimers for enhancing the stability and solubility of organic small molecules without spectral shifts: Ultrastable ultraviolet absorbers for transparent polyimide films

2025-06-24

Tae Gyu Hwang , Suhyeon Kim , Hong Mo Kim +7 more | Chemistry - A European Journal

The development of highly stable organic small molecules for optical applications is of growing interest. Multimerization of monomeric small molecules can enhance stability via increased π–π stacking, but it often … The development of highly stable organic small molecules for optical applications is of growing interest. Multimerization of monomeric small molecules can enhance stability via increased π–π stacking, but it often reduces solubility and induces undesirable spectral shifts due to π‐extension. To overcome this trade‐off, we report a trimeric small molecule (F‐TPBT) derived from a model monomer (Tinuvin 327) using a 1,3,5‐fluorinated phenyl linker. This design markedly improves thermal stability and solubility while minimizing changes in the optical absorption spectrum. F‐TPBT shows superior thermal properties (5 wt% decomposition temperature = 427 °C; weight loss after 1 h at 300 °C = 0.32 wt%) and excellent solubility (5.3 wt% in dichloromethane; 6.4 wt% in N‐methylpyrrolidone), with an absorption spectrum nearly identical to that of Tinuvin 327. These properties make F‐TPBT a promising UV light absorber for transparent polyimide films, which require processing above 300 °C and are widely used in flexible displays. Notably, F‐TPBT‐containing films retain their absorption properties even after 80 h of accelerated UV irradiation, demonstrating excellent photostability. This study presents a broadly applicable molecular design strategy for enhancing the stability and solubility of organic small molecules while avoiding significant spectral shifts.

Gold Binding and Removal by Sulfur-Based Cationic Polymers

2025-06-24

Juliette Rollins , Cameron B. Call , Daniel J. Herrera +1 more | ACS Applied Polymer Materials

Non-Solvent-Induced Self-Assembly of Para-Aramid Nanofibers with Tunable Molecular Weight for Enhanced Thermal Stability and Electrical Insulation

2025-06-24

J. D. Tong , Ran He , Chang Cui +4 more | ACS Applied Nano Materials

Design, Synthesis, and Performance Optimization of Polycarbonates With Hexafluoroisopropyl and Cyclohexyl Structures

2025-06-24

Yiming Han , Xinyu Li , Teng Sun +4 more | Journal of Polymer Science

ABSTRACT With the rapid evolution of high‐frequency electronic technologies, particularly 5G communications, the Internet of Things, and millimeter‐wave radar systems, low‐dielectric constant polycarbonate materials show tremendous potential for applications in … ABSTRACT With the rapid evolution of high‐frequency electronic technologies, particularly 5G communications, the Internet of Things, and millimeter‐wave radar systems, low‐dielectric constant polycarbonate materials show tremendous potential for applications in signal transmission technologies. In this study, a series of low‐dielectric constant co‐polycarbonates (PZAFCs) containing hexafluoroisopropyl and cyclohexyl structural units were successfully prepared via melt polycondensation of bisphenol Z (BPZ), bisphenol AF (BPAF), and diphenyl carbonate (DPC). The structure–property correlations of PZAFC copolymers were systematically investigated, especially the effect of hexafluoroisopropyl group content on the dielectric properties. The results demonstrated that the dielectric constant of PZAFCs gradually decreased with the increase of hexafluoroisopropyl structural unit content ( D k = 2.49–2.66, 1 MHz), while simultaneously maintaining stable and low‐dielectric loss ( D f = 0.0029–0.0043, 1 MHz), excellent thermal stability ( T g = 167.4°C–171.6°C), good mechanical properties (tensile strength ≥ 69.37 MPa), and superior optical transparency (above 85% transmittance at 500 nm). Therefore, the novel low‐dielectric constant polycarbonate is expected to be widely used in the fields of next‐generation high‐frequency communications, autonomous vehicles, and aerospace systems.

Cover Feature: Thermal Isomerization Rates of New Azoquinoline‐Functionalized Copolymers as a Function of Substitution Patterns (ChemPhysChem 12/2025)

2025-06-23

Dariusz Chomicki , Oksana Kharchenko , Anna Kaczmarek‐Kędziera +6 more | ChemPhysChem

Tough Polyimide Nanocomposites With High Thermal Resistance at Extremely Low Filler Content

2025-06-23

Seira Morimune‐Moriya , Yusuke Nagata | Polymer Composites

ABSTRACT In this study, we developed strong, tough, and thermally resistant polyimide (PI) nanocomposites with an extremely low content of graphene oxide (GO) using a novel in situ synthesis approach. … ABSTRACT In this study, we developed strong, tough, and thermally resistant polyimide (PI) nanocomposites with an extremely low content of graphene oxide (GO) using a novel in situ synthesis approach. The high dispersibility of GO in PI, achieved through in situ polymerization, led to significant enhancements in mechanical properties and thermal resistance. Notably, Young's modulus increased by 37% at a GO content of 0.01 wt%, while maintaining high toughness. Additionally, the thermal decomposition temperature at 5% weight loss and the glass transition temperature of the nanocomposites with 0.01 wt% GO were elevated by 15°C and 16°C, respectively, compared to pure PI. To the best of our knowledge, this is the first approach to develop graphene‐based PI nanocomposites with such a low filler content while achieving excellent physical properties.

Efficient Synthesis of End‐Sequence‐Precise Polymers for Enhanced Drug Delivery Applications

2025-06-23

Meijuan Yin , Yan Zhang , Guhuan Liu | Journal of Polymer Science

ABSTRACT To circumvent the issue of physically loaded drugs by polymers, which necessitates excessive polymer quantities and can lead to detrimental effects, herein, we have developed a series of polymers … ABSTRACT To circumvent the issue of physically loaded drugs by polymers, which necessitates excessive polymer quantities and can lead to detrimental effects, herein, we have developed a series of polymers with precisely tailored end‐group sequences. These polymers were systematically screened to identify those that exhibit specific interactions with the photosensitive drug 5,10,15,20‐tetra‐(3‐hydroxyphenyl)porphyrin ( m ‐THPP). The synthesis of these polymers was achieved through a straightforward two‐step approach, incorporating the innovative one‐pot sequential single‐unit monomer insertion (sqSUMI) method alongside reversible addition‐fragmentation chain transfer (RAFT) polymerization. This targeted interaction not only significantly enhanced the photosensitizer's aqueous solubility, photosensitizing efficacy, and cellular endocytosis but also minimized the required polymer dosage, thereby mitigating potential adverse effects.

Two-step synthesis of large-π conjugated polyimides for the anode of sodium ion battery

2025-06-23

Jun‐Long Zhang , Mingcong Yang , Huile Jin +3 more | Canadian Journal of Chemistry

This study explored a two-step synthesis to prepare polyimide (PI) for applications as the anode of sodium ion batteries (SIBs). Recently, organic materials, particularly π-conjugated organic polymers, have emerged as … This study explored a two-step synthesis to prepare polyimide (PI) for applications as the anode of sodium ion batteries (SIBs). Recently, organic materials, particularly π-conjugated organic polymers, have emerged as promising alternatives to hard carbons for SIBs that have garnered considerable attention in advancing energy storage technology due to the abundance of sodium resources and their cost-effectiveness. The proposed two-step synthesis took place at a moderate temperature 120 °C, which was much lower than the existing single step method, in which the elevated temperature might lead to by-product formation. This low temperature synthesis incorporated multiple carbonyl redox sites in the final products and effectively addressed the structural instability and active site loss that were typically associated with high-temperature synthesis processes. The resulting SIBs demonstrate a reversible capacity of 330.1 mAh g-1 after 1100 cycles at a current density of 1.0 A g-1, with a capacity retention of 99.2% and a capacity maintenance rate of 98.8%. These performance metrics are comparable to those of existing hard carbon anode materials. The results suggest that the optimization of polyimide materials presents a viable strategy for improving sodium-ion battery performance.

Chain Flexibility and Structure of a Polyimide Copolymer: Revisiting the Freely Rotating Chain Model

2025-06-23

Nicholas T. Liesen , Amitesh Maiti , C A Fox +3 more | Macromolecules

Synthesis and Structural/Physical Properties of Well-Defined Linear and Star-Shaped Polysulfides Constructed by Controlled Insertion Reaction of Thiirane and Carbamic Acid Thioester

2025-06-22

Ryota Tsutsui , Akiyuki Ryoki , Hiroaki Uchiyama +1 more | Macromolecules

Newly Developed Multicomponent Polycondensation Involving Sulfur for the Successful Synthesis of Biobased Polythioureas

2025-06-20

Thi‐Thanh‐Tam Nguyen , Trung Hieu , M. Tu +5 more | Macromolecules

Exploration of Poly(thiazole-2-thione) Structures from Multicomponent Polymerizations of Elemental Sulfur, Dichalcones, and Diisocyanides

2025-06-20

Yulian Yang , Rongrong Hu , Ben Zhong Tang | Macromolecules

Correction to: Superior flame retardant and cost‑effective aromatic polyoxydiazole fibers enabled by 2,6‑Naphthalenedicarboxylic acid

2025-06-19

Yulin Zhou , Wentao Li , Jiadeng Zhu +3 more | Journal of Polymer Research

Synergistic moisture-driven lubrication and frictional heat dissipation in porous LiCl/UPR composites

2025-06-18

Jing Chen , Wenkai Feng , Haorong Li +4 more | Tribology International

Intrinsic triazoimide membrane with highly efficient thermal management performance base on hydrogen bondings and π-π stacking of triazole rings

2025-06-18

Xueying Wu , Peipei Xu , Bowen Cheng +3 more | Progress in Organic Coatings

Fabrication and optical properties of transparent PMMA/BPEF blend films via reactive melt extrusion with catalysis of Mg(TFSI)2

2025-06-17

Zhanpeng Xu , Kang Li , Huihui Xu +2 more | Polymer

Design and Thermal Profiling of Ethyl Carbazole-Based Poly(phenoxy-imine)s: Synthesis and Characterization

2025-06-17

İsmet Kaya , Ali Osman Yılmaz , Feyza Kolcu | Research Square (Research Square)

<title>Abstract</title> A series of Schiff base monomers were synthesized via the condensation of 3-amino-9-ethylcarbazole with various aldehydes, including 3-hydroxybenzaldehyde (3-HBA), 4-hydroxybenzaldehyde (4-HBA), 2-hydroxy-1-naphthaldehyde (2-HNA), and ortho-vanillin (OV). These monomers were … <title>Abstract</title> A series of Schiff base monomers were synthesized via the condensation of 3-amino-9-ethylcarbazole with various aldehydes, including 3-hydroxybenzaldehyde (3-HBA), 4-hydroxybenzaldehyde (4-HBA), 2-hydroxy-1-naphthaldehyde (2-HNA), and ortho-vanillin (OV). These monomers were subsequently polymerized through oxidative polycondensation using NaOCl as the oxidant to yield corresponding poly(phenoxy-imine)s, namely Poly(3ECIMP), Poly(4ECIMP), Poly(ECIMN), and Poly(ECIMMP). The chemical structures of the synthesized compounds were confirmed using FT-IR, UV-Vis, and both 1H and 13C NMR spectroscopy. Thermal characterization using TG-DTA and DSC demonstrated that the synthesized polymers possess excellent thermal stability, as evidenced by their glass transition temperatures between 145 and 161°C and char yields reaching up to 38.22% at 1000°C. Furthermore, limiting oxygen index (LOI) values exceeding 28% indicate that these materials exhibit self-extinguishing behavior. Photoluminescence studies conducted in DMF demonstrated intense fluorescence, particularly for Poly(ECIMN), which exhibited yellow-orange emission upon excitation at 502 nm due to the presence of naphthalene moieties that enhance π-electron delocalization. Optical and electrochemical band gap analyses indicated significantly reduced <italic>E</italic><italic>g</italic> values for the polymers compared to their monomers, with Poly(ECIMN) showing the lowest band gap of 2.39 eV. Cyclic voltammetry results aligned with optical measurements, confirming improved charge transfer characteristics in the conjugated polymer backbone. Surface morphology assessed by FE-SEM revealed porous structures, suggesting applicability in gas adsorption or catalytic systems. Size exclusion chromatography (SEC) confirmed the formation of high molecular weight polymers with narrow polydispersity indices. Collectively, the unique combination of thermal durability, photophysical responsiveness, and structural robustness highlights the potential of these ethyl carbazole-based poly(phenoxy-imine)s in applications spanning optoelectronics, thermal protection, and fluorescence-based sensing.

Development of functional optical filters via vat photopolymerization for advanced optical applications

2025-06-17

Murad Ali , Mohamed A. El-Nemr , Israr Ahmed +3 more | Advanced Composites and Hybrid Materials

Interfacial fracture behavior of polyimide/copper in RDL structures for advanced electronic packaging

2025-06-17

Wenqing Chen , Yuexing Wang , Bofeng Li +3 more | Microelectronics Reliability

Elastomer-modified perfluorocyclobutyl polymer/SiO2 composites for corrosion-resistant coatings

2025-06-17

Mark Rigel R. Ali , Reymark D. Maalihan , Eugene B. Caldona | Composites Part B Engineering

Unlocking the potential of hydroxylated‐chalcone‐based photosensitive benzoxazines: synthesis, multifunctional properties and theoretical insights from density functional theory

2025-06-16

Subasri Appasamy , Balaji Krishnasamy , Subhapriya Pushparaju +1 more | Polymer International

Abstract This work pioneers the synthesis of a new class of benzoxazine monomers incorporating hydroxylated chalcone units (HAN‐HB) using 2′‐hydroxy‐1′‐acetonaphthone (HAN) and p ‐hydroxybenzaldehyde (HB) by following the Claisen–Schmidt condensation … Abstract This work pioneers the synthesis of a new class of benzoxazine monomers incorporating hydroxylated chalcone units (HAN‐HB) using 2′‐hydroxy‐1′‐acetonaphthone (HAN) and p ‐hydroxybenzaldehyde (HB) by following the Claisen–Schmidt condensation process. Three types of structurally varied bifunctional benzoxazines (Bz) were prepared using HAN‐HB and paraformaldehyde separately with tyramine (ty), 3‐amino‐1‐propanol (ap) and 2‐(2‐aminoethoxy)ethanol (aee) by adopting Mannich condensation. Both the HAN‐HB and benzoxazine molecular structures were confirmed by different spectroscopic analyses. DSC analysis reveal that HAN‐HB‐ap benzoxazine showed the lowest T p value of 214 °C. Poly(HAN‐HB‐ty) possesses the highest values of thermal decomposition temperature and percentage char yield. Further, all the polybenzoxazines exhibit self‐extinguishing and good heat‐resistant properties. In addition, the synthesised benzoxazines showed good anti‐microbial behavior. Photosensitive properties of the benzoxazines were studied using UV–visible spectroscopic analysis and the results indicated that the synthesised benzoxazines exhibited both photo‐isomerisation and photocrosslinking due to their inherent molecular rearrangement ability. An aggregation‐caused quenching characteristic was observed for the benzoxazines through a fluorescence study. From the water contact angle study, it was inferred that all the poly(HAN‐HB‐Bz) exhibited a water repellent nature and showed a higher water contact angle of 151°. The corrosion‐resistant behaviour of polybenzoxazines towards a mild steel surface was studied and the results obtained infer that these materials exhibit good protection efficiency. Density functional theory studies were performed for all the chalcone‐based benzoxazines. The incorporation of hydroxyl groups not only improves hydrogen bonding interactions, enhancing thermal stability, but also introduces photo‐reactivity. This dual functionality is not commonly reported in conventional benzoxazines. The results obtained from various studies suggest that the developed chalcone‐based benzoxazines can be suitably exploited for advanced photosensitive coating applications. © 2025 Society of Chemical Industry.

Formulation and evaluation of Liquisolid compact of Nitrofurantoin

2025-06-16

Ayesha Momin , Shraddha Mitthu Chavan , Sachin Vitthal Datkhile +1 more | World Journal of Biology Pharmacy and Health Sciences

This study focuses on improving the solubility and dissolution rate of Nitrofurantoin, a water-insoluble antimicrobial agent, using the liquisolid compact technique. Liquisolid technology offers a promising approach to enhance the … This study focuses on improving the solubility and dissolution rate of Nitrofurantoin, a water-insoluble antimicrobial agent, using the liquisolid compact technique. Liquisolid technology offers a promising approach to enhance the bioavailability of poorly soluble, lipophilic drugs by converting them into dry, free-flowing, and compressible powder blends. In this research, Nitrofurantoin was dissolved in various non-volatile solvents such as Tween 20 and PEG 400 to create liquid drug formulations. These formulations were then adsorbed onto carrier materials like microcrystalline cellulose and coated with Talc to produce liquisolid powders. The resulting tablets were evaluated for both pre-compression (flow properties) and post-compression characteristics, including hardness, friability, disintegration time, and in vitro drug release. Results demonstrated a significant improvement in the dissolution rate of Nitrofurantoin from the liquisolid tablets compared to those prepared by direct compression. This enhancement is likely due to the increased surface area, improved wetting, and better solubilization of the drug in the chosen non-volatile solvents. Overall, the study confirms that the liquisolid compact technique is an effective and practical strategy to enhance the dissolution profile of Nitrofurantoin, which may lead to improved therapeutic outcomes.

A Synthesis and Mesophase behaviour of Homologous Series: 4-(4’-n-alkoxy cinnamoyloxy) Azo 4”-bromo-3”-methyl benzene with Terminal Methyl and bromo group

2025-06-16

R. A. RANE , Vandit Pandya , Dhruv P. Darji +2 more | Scientiae Radices

A new homologous series 4-(4’-n-alkoxy cinnamoyloxy) Azo 4”-bromo-3”-methyl benzene was synthesized with a view to understand and establish the relation between mesogenic properties and structure of molecules. Ethyl to hexadecyl … A new homologous series 4-(4’-n-alkoxy cinnamoyloxy) Azo 4”-bromo-3”-methyl benzene was synthesized with a view to understand and establish the relation between mesogenic properties and structure of molecules. Ethyl to hexadecyl all twelve homologues are enantiotropically nematogenic. None of the homologues exhibited a smectogenic mesophase. No odd–even effect was observed in the transition curve. The average thermal stability was observed to be 127.9°C and the nematogenic mesophase ranged from 8.0°C to 16.0°C. Thus, the series was found to be of a low ordered melting type with moderate nematogenic range. Analytical data confirmed the structure of the compounds, and the mesomorphism was identified by optical microscopy. The mesogenic properties were compared with structurally similar compounds.

Facile Synthesis of Polyfluorene-b-Poly(phenyl isocyanide) Copolymers Enables Engineered Morphological Diversity

2025-06-16

Benfa Chu , Huizhen Yu , Shuyang Zhao +1 more | ACS Applied Polymer Materials

Synthesis and molecular simulation of low-dielectric cardo-based polyimides with amide- or ester-linked architectures

2025-06-16

Jun Peng , Wei Yang , Yuhan Liu +5 more | Macromolecular Research

Low Dielectric Polymers with Polyarylate Containing Large Volume Structural Pendant Groups

2025-06-15

Wanqi Tang , Yuxi Liu , Xianghai Jing +5 more | Macromolecular Chemistry and Physics

ABSTRACT Polyarylate (PAR) is a high‐performance engineering plastic with excellent dielectric properties, making it promising for applications in the electronics and electrical appliances. However, the rapid advancement of communication technology … ABSTRACT Polyarylate (PAR) is a high‐performance engineering plastic with excellent dielectric properties, making it promising for applications in the electronics and electrical appliances. However, the rapid advancement of communication technology increases the demands for materials with extremely low dielectric constants to address signal delay issues caused by the miniaturization and high integration of electronic devices. In this study, a series of polymers (P1A9Tx) with varying proportions of acyl chloride are designed and synthesized, incorporating a large volume of phenolphthalein pendant groups into their molecular chains. Phenolphthalein, with its three rigid, non‐coplanar benzene rings, effectively influences the dielectric constant ( D k ) and thermal properties of the polymer. The D k values range from 1.21 to 2.07 at frequence of 10 7 Hz, while the 10% weight loss temperatures ( T d10 ) remain between 452°C and 469°C. Additionally, the effects of different benzene ring structures ( m ‐benzene and p ‐benzene) on the properties of the polymers are investigated. Among the polymers, P1A9T4, with a terephthaloyl chloride (TPC) to iso ‐phthaloyl chloride (IPC) ratio of 4:6, exhibits exceptional low dielectric properties, making it suitable for use as a dielectric device in high‐frequency communications.

Dynamic and structural insights into hydrogen-bonded interpolymer complexes of poly(2-alkyl-2-oxazolines) with poly(carboxylic acids)

2025-06-13

R. Yu. Smyslov , Yu. E. Gorshkova , T. N. Nekrasova +4 more | Journal of Colloid and Interface Science

Polyimides with different chain lengths of ethylene oxide moiety in the polymer main chain: Synthesis and properties

2025-06-12

Myeongjin Park , Su Bin Park , Jihye Baek +1 more | Molecular Crystals and Liquid Crystals

Engineering Multiple Alkoxyls into Elastomeric Oligomers toward Novel Interfacial Regulator of Rubber/Silica Composites

2025-06-12

Shafan Xiong , Siwu Wu , Jialiang Chen +5 more | Macromolecules

A Review on Modified Polyimide Films for Flexible <scp>AMOLED</scp> Devices

2025-06-11

Jinmao You , Yong Xu , Wei Zeng +2 more | Journal of Polymer Science

ABSTRACT Active‐Matrix Organic Light‐Emitting Diode (AMOLED) technology has witnessed rapid advancements as display technology continues to evolve. A standout feature of AMOLED displays is their flexibility, which necessitates the integration … ABSTRACT Active‐Matrix Organic Light‐Emitting Diode (AMOLED) technology has witnessed rapid advancements as display technology continues to evolve. A standout feature of AMOLED displays is their flexibility, which necessitates the integration of various flexible electronic components. However, the limited stretchability and adaptability of traditional metal and inorganic semiconductors pose significant challenges for their application in flexible devices. In contrast, polymers and their composite materials, owing to their excellent flexibility, robust interface bonding, superior thermal, mechanical, and optical properties, have emerged as fundamental materials for fabricating flexible electronic devices. Among these, high‐performance polyimide (PI) films have garnered significant attention for their potential use in flexible AMOLED devices. The development of such PI films involves four primary modification directions: enhancing thermal performance, reducing the coefficient of thermal expansion (CTE), improving mechanical properties, and increasing transparency. This article provides a comprehensive overview of recent advancements in the production, synthesis, and modification of PI films tailored for flexible AMOLED applications. It also explores diverse application scenarios of flexible AMOLED devices across multiple fields and outlines future development strategies.

Research Committee for Organic Optics and Electronics Materials

2025-06-10

Toshiyuki Watanabe | Sen i Gakkaishi

Controllable Fabrication of Submicron‐Thick Polyimide Films by Piezoelectric Spraying

2025-06-10

Yuxuan Xu , Ruoqing Zhao , Weiwei Li +5 more | Macromolecular Chemistry and Physics

ABSTRACT Polyimide (PI) films have been extensively utilized as flexible substrates in various cutting‐edge fields, including aerospace, microelectronics, and healthcare. However, existing techniques to prepare PI films typically exhibit a … ABSTRACT Polyimide (PI) films have been extensively utilized as flexible substrates in various cutting‐edge fields, including aerospace, microelectronics, and healthcare. However, existing techniques to prepare PI films typically exhibit a limited degree of thickness controllability, surface uniformity, and mechanical stability, which hardly meet the requirements in high‐precision flexible devices and integrated systems. Here, a piezoelectric spray coating method is proposed for preparing high‐quality PI films with controllable thickness. We have investigated the atomization effect and key parameters in the spraying process, such as viscosity, amplitude, liquid feed rate, speed, air pressure, and spraying cycles. We can precisely control the thickness of the resultant PI films by optimizing these parameters. The prepared PI films exhibit superior characteristics, such as high smoothness, bubble‐free surfaces, uniform thickness, high thermal stability, and excellent optical properties. With these advantages, such an approach may contribute to developing high‐performance flexible electronics.

Towards Industrialization of Poly-Ethylene Terephthalate Glycol Material Fabricated by Fused Filament Fabrication Technique

2025-06-09

Ghias Kharmanda | Journal of Modern Polymer Chemistry and Materials

The material properties of Polyethylene terephthalate glycol (PETG) can be highly improved when adding other polymers or materials, however, we focus on this mini review only on pure PETG material … The material properties of Polyethylene terephthalate glycol (PETG) can be highly improved when adding other polymers or materials, however, we focus on this mini review only on pure PETG material fabricated by Fused Filament Fabrication (FFF) technique to overcome the corresponding issues with the object of industrializing the pure PETG material. In our previous works, deterioration concept was introduced to extend far beyond the concept of traditional failure concept, and its corresponding cases were classified into two categories: certainty and uncertainty cases. So, to industrialize this material fabricated by FFF technique, only certainty cases (reasons behind deterioration cases (defect/ fault/ failure/ damage)) can be characterized. These cases are treated here and next compared to other polymers such as Poly lactic acid (PLA) and/or Acrylonitrile Butadiene Styrene (ABS) materials if needed to overcome the different issues occurred when the studied this material by FFF technique. Several roadmaps are proposed considering the use of advanced techniques such as Artificial Intelligence (AI) and multi-level optimization.

Correction to “Physical Mechanisms of Linear and Nonlinear Spectra of All‐Benzene Catenane and Trefoil Knots Based on the First Principle”

2025-06-08

| International Journal of Quantum Chemistry