Preparation of poly(p-phenylenepyromelliteimide) microspheres with rugged surfaces using crystallization during isothermal polymerization

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7 Citations (Scopus)

Abstract

Preparation of discrete PPPI microspheres was examined using the crystallization of oligomers during isothermal polymerization of PMDA and p-phenylene diisocyanate, and that of pyromellitic dithioanhydride and PPDA in poor solvents. In contrast to PPPI microspheres with smooth surfaces that were previously prepared by phase-separation during the polymerization of PPDA and PMDA, the microspheres obtained here consisted of flake-like lamellae with rugged surfaces. The diameters of the microspheres ranged from 0.5 to 6.7 μm. They exhibited excellent thermal stability depending on the monomers. These results provide a new preparative procedure of the PPPI microsphere with a rugged surface. (figure prested)

Original languageEnglish
Pages (from-to)159-167
Number of pages9
JournalMacromolecular Chemistry and Physics
Volume212
Issue number2
DOIs
Publication statusPublished - Jan 18 2011

Keywords

  • heteroatom-containing polymers
  • high-performance polymers
  • microspheres
  • morphology

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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