Preparation of needle-like poly(azomethine) crystals by means of reaction-induced crystallization of oligomers

Kunio Kimura, Jin Huang Zhuang, Kohtaro Shirabe, Yuhiko Yamashita

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Needle-like poly(azomethine) crystals were successfully prepared by the polycondensation of 1,4-phenylenediamine and 1,4-terephthalaldehyde in liquid paraffin at 180 °C. The favorable polymerization concentration for the preparation of the well-defined needle-like crystals was 2.0 × 10-2 mol 1-1. The average length and width of the needle-like crystals were 7.7 and 0.6 μm, respectively. These crystals possessed high crystallinity and good thermal stability. The extended polymer chains were aligned along the long axis of the needle-like crystal. The morphological observations indicated that the needle-like crystals were formed through the spiral growth of the oligomer lamellae caused by the screw dislocation.

Original languageEnglish
Pages (from-to)4761-4764
Number of pages4
Journalpolymer
Volume44
Issue number17
DOIs
Publication statusPublished - Aug 17 2003

Keywords

  • Needle-like crystals
  • Poly(azomethine)
  • Polycondensation

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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