Nonstoichiomeric polymerization of polyimide by using reaction-induced crystallization of oligomers

Kanji Wakabayashi, Takuya Ito, Shinichi Yamazaki, Kunio Kimura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Nonstoichiometric preparation of poly(4,4'-oxydiphenylene pyromelliteimide)(Kapton) from pyromellitic dianhydride (PMDA) and 4,4'-oxydianiline (ODA) was examined by using reaction-induced crystallization of oligomers. When the polymerization was carried out under stoichiometric condition, the crystals having ηinh of 1.58 dL/g were obtained. Under the excess ODA, ηinh was insensitive toward the imbalance of stoichiometry, and suprisingly, ηinh became 1.63 dL/g even under 50 mol% excess. In the polymerization under nontoichiometric condition, the terminated oligomers precipitated to form the crystals and the solid-state polymerization proceeded with the elimination of terminated oligomer unit in oligomer crystals resulting in high molecular weight.

Original languageEnglish
Title of host publicationPolymer Preprints, Japan
Pages281
Number of pages1
Volume55
Edition1
Publication statusPublished - 2006
Event55th SPSJ Annual Meeting - Nagoya, Japan
Duration: May 24 2006May 26 2006

Other

Other55th SPSJ Annual Meeting
CountryJapan
CityNagoya
Period5/24/065/26/06

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Keywords

  • Crystallization of oligomers
  • Nonstoichiometric polymerization
  • Polyimide

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Wakabayashi, K., Ito, T., Yamazaki, S., & Kimura, K. (2006). Nonstoichiomeric polymerization of polyimide by using reaction-induced crystallization of oligomers. In Polymer Preprints, Japan (1 ed., Vol. 55, pp. 281)