Results 121 to 130 of about 1,007 (177)
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Polybenzimidazoles. VI. Polybenzimidazoles containing aryl sulfone linkages
Journal of Polymer Science Part A-1: Polymer Chemistry, 1967AbstractFour new polybenzimidazoles with aryl sulfone linkages between the recurring units have been prepared in order to study their thermal stability and solubility properties. The polymers prepared were high molecular weight materials with good thermal stability.
T. V. Lakshmi Narayan, C. S. Marvel
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Die Angewandte Makromolekulare Chemie, 1974
AbstractPoly‐[2,2′‐(m‐phenylene)‐5,5′‐bisbenzimidazole] (PBI) was originally developed as a fiber‐forming polymer for military applications. The eventually established intrinsic nonflammability (LOI 48%) and high moisture regain (13%) expanded application areas significantly; e.g., into protective suits.
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AbstractPoly‐[2,2′‐(m‐phenylene)‐5,5′‐bisbenzimidazole] (PBI) was originally developed as a fiber‐forming polymer for military applications. The eventually established intrinsic nonflammability (LOI 48%) and high moisture regain (13%) expanded application areas significantly; e.g., into protective suits.
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Synthesis of Polybenzimidazoles
2016Recent progress in the synthesis of polybenzimidazole (PBI) derivatives is summarized for application as high temperature polymer electrolyte membrane in fuel cells. Various designs in the polymer structure are described aiming at improvement of the membrane performance.
Jingshuai Yang, Ronghuan He, David Aili
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Journal of Polymer Science Part A: General Papers, 1964
AbstractPolybenzimidazoles have been prepared from 2,3‐, 2,7‐, and 2,6‐naphthalenedicarboxylic acids, 1,1′ ‐ferrocenedicarboxylic acid, maleic acid, fumaric acid, 4,5‐imidazole‐dicarboxylic acid, perfluoroglutaric acid, perfluorosuberic acid, and 3,3′ ‐diaminobenzidine. A copolymer has been prepared from a mixture of terephthalic acid and 2,2′‐diphenic
L. Plummer, C. S. Marvel
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AbstractPolybenzimidazoles have been prepared from 2,3‐, 2,7‐, and 2,6‐naphthalenedicarboxylic acids, 1,1′ ‐ferrocenedicarboxylic acid, maleic acid, fumaric acid, 4,5‐imidazole‐dicarboxylic acid, perfluoroglutaric acid, perfluorosuberic acid, and 3,3′ ‐diaminobenzidine. A copolymer has been prepared from a mixture of terephthalic acid and 2,2′‐diphenic
L. Plummer, C. S. Marvel
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Polybenzimidazoles. II. Polyalkylenebenzimidazoles
Die Makromolekulare Chemie, 1964AbstractPolyalkylenebenzimidazoles were prepared by solution polycondensation of 3,3′‐diaminobenzidine tetrahydrochloride with aliphatic dicarboxylic acids in polyphosphoric acid. Procedure used here was the same as that for polyphenylenebenzimidazoles reported previously.Their preparation and physical properties, such as a thermal stability ...
Yoshio Iwakura +2 more
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Synthesis of new polybenzimidazoles
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 19681. New polybenzimidazoles containing ether linkages in the polymer chain have been synthesized by a solid phase polycondensation method. 2. The new polymers combine improved solubility in organic solvents with excellent thermal stability.
V. V. Korshak +3 more
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Polybenzimidazole-Ester-Imides
Journal of Macromolecular Science: Part A - Chemistry, 1991Abstract Thermostable heterocyclic polymers containing benzimidazole and imide rings, as well as flexible ester groups, have been synthesized by solution polycondensation of diaminobenzimidazoles with dianhydrides incorporating preformed ester linkages.
Elena Hamciuc +2 more
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A Critical Review of Polybenzimidazoles
Polymer Reviews, 1997Abstract About 8 years ago, Brinker and Robinson [l] invented the first aliphatic polybenzimidazoles. Two years later, aromatic polybenzimidazoles with impressive thermal properties were synthesized by Vogel and Marvel [2, 3] at the University of Illinois and later at Du Pont.
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Sulfoalkylation of a polybenzimidazole with propanesultone
Journal of Applied Polymer Science, 1970AbstractPoly‐2,2′‐(m‐phenylene)‐5,5′‐bisbenzimidazole has been alkylated with propanesultone to yield polymers which are readily dyed with basic dyes. Propanesultone has been used to convert cellulose, starch, phenolformaldehyde resin, and various vinyl copolymers into hydrophilic materials which dye readily or act as ion exchange resins.1–5 It seemed ...
null Jenöszita, C. S. Marvel
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Solution polymerization of polybenzimidazole
Journal of Polymer Science Part A: Polymer Chemistry, 2016ABSTRACTPolybenzimidazoles (PBI) are an important class of heterocyclic polymers that exhibit high thermal and oxidative stabilities. The two dominant polymerization methods used for the synthesis of PBI are the melt/solid polymerization route and solution polymerization using polyphosphoric acid as the solvent.
Kayley J. Fishel +5 more
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