PREPARATION OF POLYPYROMELLITIMIDES WITH CROWN-ETHER SEGMENTS


BICAK N., KOZA G.

JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY, ss.201-205, 1994 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası:
  • Basım Tarihi: 1994
  • Dergi Adı: JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY
  • Sayfa Sayıları: ss.201-205

Özet

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.