PREPARATION OF POLYPYROMELLITIMIDES WITH CROWN-ETHER SEGMENTS

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BICAK N., KOZA G.

JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY, pp.201-205, 1994 (SCI-Expanded)

• Publication Type: Article / Article
• Volume:
• Publication Date: 1994
• Journal Name: JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY
• Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
• Page Numbers: pp.201-205
• Istanbul Technical University Affiliated: No

Abstract

Crown ether containing polypyromellitimides as cast films were prepared by reacting cis-or trans-diamino dibenzo 18-crown-6 with pyromellitic dianhydride. Binary mixtures of crown ether diamines with some aromatic diamines (p-phenylene diamine, benzidine and 4,4'-diamino diphenyl methane) were also used to obtain copolyimides. Our observations shaw that incorporation of crown ether segments imparts little solubility in N-methyl 2-pyrrolidone and N,N-dimethyl formanide, but reduce the thermal stability of polymides.