Morphology control of poly(azomethine ester) by using reaction-induced oligomer phase separation

Research output: Contribution to conferencePaper

Abstract

Spindle-like crystals of poly(azomethine ester) (PAME) were formed by the polymerization of 4-(4-acetoxybenzylidenamino)benzoic acid (ABBA) in liquid paraffin (LPF) at 300°C via reaction-induced crystallization of oligomers. But the trace of lamellae stacking structure was observed on the surface of crystals due to the lack of post-polymerization between the oligomers in the crystals. In order to induce the crystallization at 350°C to accelerate the post-polymerization, the polymerization of ABBA was carried out in the mixed solvent of LPF and aromatic solvent. This polymerization afforded the fibrillar crystals having smooth surface. One-pot polymerization of 4-acetoxybenzaldehyde and 4-aminobenzoic acid yielded ribbon-like PAME crystals besides spherical precipitates. These ribbon-like crystals showing the larger width than the fibrillar crystals prepared from ABBA were formed by the crystallization of oligomers through the stepwise formation of azomethine linkage and ester linkage during the elevated temperature polymerization. These crystals possessed quite high crystallinity as well as the fibrillar crystals. The morphology of PAME was controllable by means of precipitation during solution polymerization.

Original languageEnglish
Pages4777-4778
Number of pages2
Publication statusPublished - Dec 1 2005
Event54th SPSJ Symposium on Macromolecules - Yamagata, Japan
Duration: Sep 20 2005Sep 22 2005

Other

Other54th SPSJ Symposium on Macromolecules
CountryJapan
CityYamagata
Period9/20/059/22/05

Keywords

  • Crystallization
  • Morphology
  • Oligomer
  • Phase separeation
  • Poly(azomethine ester)
  • Polycondensation

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Yakushi, Y., Yamazaki, S., Uchida, T., & Kimura, K. (2005). Morphology control of poly(azomethine ester) by using reaction-induced oligomer phase separation. 4777-4778. Paper presented at 54th SPSJ Symposium on Macromolecules, Yamagata, Japan.