Catalysts for the preparation of polybenzimidazoles

Autor:	Eui-Won Choe
Rok vydání:	1994
Předmět:	chemistry.chemical_classification Condensation polymer Polymers and Plastics General Chemistry Polymer Condensation reaction Surfaces Coatings and Films Catalysis Isophthalic acid chemistry.chemical_compound Membrane Synthetic fiber chemistry Polymerization Polymer chemistry Materials Chemistry
Zdroj:	Journal of Applied Polymer Science. 53:497-506
ISSN:	1097-4628 0021-8995
DOI:	10.1002/app.1994.070530504
Popis:	The single-stage preparation of poly[2,2′-(m-phenylene)-5,5′-bibenzimidazole] (PBI), from 3,3′,4,4′-tetraaminobiphenyl (TAB) with isophthalic acid (IPA) in the presence of a catalyst, was explored and developed. The effects of a variety of catalysts on the polymerization of TAB with IPA and/or diphenyl isophthalate were screened and evaluated. Many organo phosphorus and silicon compounds catalyzed the PBI condensation reactions, increased the molecular weight, and improved the quality of PBI polymers. Fiber and reverse osmosis membrane properties of PBI prepared from TAB and IPA were comparable to those for commercial standard PBI prepared from TAB and diphenyl isophthalate. © 1994 John Wiley & Sons, Inc.
Databáze:	OpenAIRE
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