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Modification of bismaleimide resin by poly(phthaloyl diphenyl ether) and the related copolymers
Author(s) -
Iijima Takao,
Nishina Tsutomu,
Fukuda Wakichi,
Tomoi Masao
Publication year - 1998
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19980131)67:5<769::aid-app1>3.0.co;2-r
Subject(s) - diphenyl ether , ether , terephthaloyl chloride , ketone , materials science , polymer chemistry , copolymer , composite material , chemistry , organic chemistry , polymer
Poly(ether ketone ketone)s were prepared and used to improve the brittleness of the bismaleimide resin. The bismaleimide resin was composed of 4,4′‐bismaleimidediphenyl methane (BMI) and o,o ′‐diallyl bisphenol A (DBA). Poly(ether ketone ketone)s include poly(phthaloyl diphenyl ether) (PPDE), poly(phthaloyl diphenyl ether‐ co ‐isophthaloyl diphenyl ether) (PPIDE), and poly(phthaloyl diphenyl ether‐ co ‐terephthaloyl diphenyl ether) (PPTDE). PPIDE (50 mol % isophthaloyl unit) was more effective as a modifier for the bismaleimide resin than were PPDE and PPTDE (50 mol % terephthaloyl unit). Morphologies of the modified resins changed from particulate to cocontinuous and to phase‐inverted structures, depending on the modifier structure and content. The most effective modification for the cured resins could be attained because of the cocontinuous phase or phase‐inverted structure of the modified resins. For example, when using 10 wt % of PPIDE (50 mol % IP unit, MW 349,000), the modified resin had a phase‐inverted morphology and the fracture toughness ( K IC ) for the modified resins increased 75% with retention in flexural properties and the glass transition temperature, compared to those of the unmodified cured bismaleimide resin. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 67:769–780, 1998