Preparation of poly(p-oxybenzoyl) whisker in paraffin wax

Ashim Kumer Sarker, Kunio Kimura, Yuhiko Yamashita

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

An influence of solvent on morphology as well as growth mechanism of poly(p-oxybenzoyl) whisker in paraffin wax (PW) was studied comparing with those in liquid paraffin (LPF). Furthermore, the condition for consecutive addition of oligomer was also examined to lengthen the whiskers in PW. Polymerizations of p-acetoxybenzoic acid were carried out in PW and LPF at 330°C. Larger number of whiskers having smaller length and width were formed in PW compared with that in LPF. PW was a poorer solvent than LPF and this lower miscibility leaded to the crystallization of lower DPn oligomers. Additionally, formation rate of oligomer was bigger in PW than LPF. These facts resulted in the higher degree of super saturation of oligomers which generated a larger number of nuclei having smaller size. Since the length was determined by the number of nuclei and the yield, the length eventually became shorter. On the basis of the formation mechanism of the whisker in PW, oligomers were added into polymerization system to lengthen the whisker. When oligomers were added to compensate the consumed oligomers while the tip angle was constantly kept at 80°C, the steady growth period was expanded and the length increased from 13.4 μm to 22.1 μm.

Original languageEnglish
Pages (from-to)426-436
Number of pages11
JournalPolymer Journal
Volume34
Issue number6
DOIs
Publication statusPublished - Jan 1 2002

Keywords

  • Crystallization
  • Miscibility
  • Oligomer
  • Paraffin Wax
  • Poly(p-oxybenzoyl)
  • Whisker

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

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