Copolymerization effect of m-acetoxybenzoic acid on morphology of poly(oxy-1,4-benzenediylcarbonyl) whiskers

Kunio Kimura, Yuhiko Yamashita

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


Copolymerizations of p-acetoxybenzoic acid (p-ABA) and m-acetoxybenzoic acid (m-ABA) were carried out in liquid paraffin at 330°C without stirring. Needlelike crystals are obtained when the content of m-ABA in the feed (χf) is in the range of 0-30 mol %. These needlelike crystals are inclined to show the fibrillation in both ends and the radial growth nature from the central part as χf increased. At higher χf than 40 mol %, crystals are not precipitated during polymerization. The content of m-oxybenzoyl units in the obtained whiskers (χw) are much lower than χf. The details of the polymerization and crystallization processes reveal that cooligomers containing more m-oxybenzoyl units cannot participate in the formation of needlelike crystals due to the higher solubility and the segregation effect of crystallization. The whiskers are predominantly formed by co-oligomers consisting almost entirely of p-oxybenzoyl units.

Original languageEnglish
Pages (from-to)739-745
Number of pages7
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Issue number5
Publication statusPublished - Apr 15 1996


  • Copolymerization
  • Crystals crystallization during polymerization
  • Needlelike
  • Poly(oxy-1,4-benzenediylcarbonyl)
  • Polymer whisker

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry


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