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Morphology of poly( p ‐oxybenzoyl) prepared in perfluoropolyether
Author(s) -
Kimura Kunio,
Ohmori Hideki,
Uchida Tetsuya,
Yamashita Yuhiko
Publication year - 2005
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.540
Subject(s) - miscibility , materials science , morphology (biology) , polymerization , solvent , polymer chemistry , whisker , crystallization , phase (matter) , chemical engineering , organic chemistry , polymer , chemistry , composite material , genetics , engineering , biology
Abstract Solvent effect on the morphology of poly( p ‐oxybenzoyl) (POB) prepared by the reaction‐induced phase separation of oligomers was examined by the polymerization of p ‐acetoxybenzoic acid in perfluoropolyether Aflunox TM (AFL2507 and AFL606). Polymerization was carried out at 320°C for 6 hr. POB microspheres were formed in AFL2507 by the liquid–liquid phase separation of oligomers due to the low miscibility of oligomers in AFL2507. The molecular weight of the solvent influenced the morphology, and the polymerization in AFL606 of which the molecular weight was lower than AFL2507 yielded whiskers formed by crystallization of oligomers induced by the increase in miscibility compared with that in AFL2507. The solvent structure and its molecular weight influenced the miscibility of oligomers and ultimately controlled the morphology from whisker to microsphere. Copyright © 2004 John Wiley & Sons, Ltd.