Morphology control of polybenzimidazole by using reaction-induced phase separation of oligomers during solution polymerization

Shin Ichiro Kohama, Shinichi Yamazaki, Kunio Kimura, Jin Gong, Kaoru Shimamura

Research output: Contribution to conferencePaperpeer-review

Abstract

This paper deals with a new finding on the morphology control of poly[2,2′-(p-phenylene)-5,5′-bibenzimidazole] (PBI) by using the reaction-induced crystallization of oligomers during solution polymerization. Polymerizations of 3,3′-diaminobenzidine and diphenyl terephthalate or terephthalic acid were carried out at 350°C for 6 hours in poor solvent such as dibenzyl toluene mixture to induce the crystallization of oligomers. Bundle-like aggregates of PBI nanofibers and plate-like PBI crystals were prepared with high yields. The values of inherent viscosity of FBI were 0.49 - 0.58 dL/g. Obtained crystals possessed high crystallinity measured on WAXS and good thermal stability. The morphology of the products was drastically influenced by the end-group structure of phase separated oligomers.

Original languageEnglish
Number of pages1
Publication statusPublished - Dec 1 2006
Event55th Society of Polymer Science Japan Symposium on Macromolecules - Toyama, Japan
Duration: Sep 20 2006Sep 22 2006

Other

Other55th Society of Polymer Science Japan Symposium on Macromolecules
CountryJapan
CityToyama
Period9/20/069/22/06

Keywords

  • Oligomer
  • Polybenzimidazole
  • Reaction-induced crystallization
  • Thermal stability

ASJC Scopus subject areas

  • Engineering(all)

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