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

Fingerprint

Crystallization
Microspheres
polymerization
Polymerization
crystallization
preparation
diisocyanates
flakes
lamella
oligomers
thermal stability
monomers
Oligomers
Phase separation
Thermodynamic stability
Monomers
4-(2'-pyridyldithio)benzyldiazoacetate

Keywords

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

ASJC Scopus subject areas

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

Cite this

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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)",
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T1 - Preparation of poly(p-phenylenepyromelliteimide) microspheres with rugged surfaces using crystallization during isothermal polymerization

AU - Wakabayashi, Kanji

AU - Uchida, Tetsuya

AU - Yamazaki, Shinichi

AU - Kimura, Kunio

PY - 2011/1/18

Y1 - 2011/1/18

N2 - 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)

AB - 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)

KW - heteroatom-containing polymers

KW - high-performance polymers

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KW - morphology

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