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Chemical modification of of polypyrrole. I. Preparation and structural characterization of polypyrrole electrophically substituted with phthalic anhydride and pyromellitic dianhydride
Author(s) -
Biswas Mukul,
Roy Anindita
Publication year - 1994
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1994.070540702
Subject(s) - phthalic anhydride , polypyrrole , pyromellitic dianhydride , anhydrous , polymer chemistry , chemistry , hydroquinone , polyphosphazene , chloride , chemical modification , ferric , condensation polymer , organic chemistry , catalysis , polymerization , polymer , polyimide , layer (electronics)
Abstract Polypyrrole (PPY) prepared in ether and in aqueous medium has been modified by polycondensation with phthalic anhydride (PA) and pyromellitic dianhydride (PMDA) in presence of Friedel–Crafts catalysts such as anhydrous zinc chloride and anhydrous ferric chloride at high temperature. The substitution reaction between PPY and the anhydrides presumably proceeds by intra‐and interchain resulting in the formation of intractable products. The characterstic carbonyl absorption band expected for CO and diketone groups in the proposed structure for the polycondensates has been observed in spectra of the anhydride‐modified poly‐condensates. XRD pattern of the polycondensates is totally amorphous. © 1994 John Wiley & Sons, Inc.