PREPARATION OF POLYPYROMELLITIMIDES WITH CROWN-ETHER SEGMENTS


BICAK N., KOZA G.

JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY, pp.201-205, 1994 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume:
  • Publication Date: 1994
  • Title of Journal : JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY
  • Page Numbers: pp.201-205

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.