One-pot synthesis of an alternating copolyimide based on regioselective reaction of a non-symmetrical alicyclic dianhydride

Kazuaki Kudo, Takuya Yoshizawa, Takashi Hamada, Jun Li, Seiji Sakamoto, Shinsaku Shiraishi

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Four constitutionally isomeric copoly(amide acid)s (coPAAs), two alternating and two random, have been successfully obtained from the same combination of one non-symmetrical alicyclic tetracarboxylic dianhydride (1.0 molar equivalents) and two symmetric aromatic diamines (0.5 molar equivalents each) by only slightly changing the reaction procedures. When the reaction mixture is subjected to chemical imidization conditions without isolation of coPAAs, the corresponding copolyimides (coPIs) are obtained in one pot. All of the coPIs are slightly yellow amorphous powders and the solubility of them is similar to each other. The glass transition temperatures of the alternating coPIs are lower in comparison to those of the random coPIs.

Original languageEnglish
Pages (from-to)1430-1436
Number of pages7
JournalMacromolecular Rapid Communications
Volume27
Issue number17
DOIs
Publication statusPublished - 2006 Sep 4

Keywords

  • KGaA alternating copolymer
  • One-pot synthesis
  • Polyimides
  • Step-growth polymerization

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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