Hollow spheres of aromatic polyamide prepared by reaction-induced phase separation

Yuji Fujitsu, Hirofumi Nakayama, Tetsuya Uchida, Shinichi Yamazaki, Kunio Kimura

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Hollow spheres of aromatic polyamide are obtained by the reaction-induced phase separation during polymerization of 5-hydroxyisophthalic acid and 1,4-phenylene diamine in an aromatic solvent at a concentration of 1-2% at 320 °C without stirring. The hollow sphere has a dimple hole and the diameters of the hollow spheres are 3-4 μm. The droplets are initially generated via liquid-liquid phase separation and then rigid cross-linked network structure formed the rigid skin layer on the surface of the droplets. The solidification of the droplets occurred owing to the further polymerization in them with maintaining the morphology to form the hollow spheres. The hollow spheres exhibit outstanding thermal stability.

Original languageEnglish
Pages (from-to)780-785
Number of pages6
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume51
Issue number4
DOIs
Publication statusPublished - Feb 15 2013

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Keywords

  • high-performance polymers
  • hollow spheres
  • morphology
  • phase separation
  • polyamides

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Organic Chemistry

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