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A new class of transparent polymeric materials. I. Production and properties of an alternating copolymer of N ‐methylmaleimide and isobutene
Author(s) -
Doi Toru,
Sugiura Yoshihiko,
Yukioka Satoshi,
Akimoto Akira
Publication year - 1996
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(19960801)61:5<853::aid-app18>3.0.co;2-y
Subject(s) - copolymer , materials science , polycarbonate , composite material , heat deflection temperature , polymer , polymer chemistry , transmittance , amorphous solid , birefringence , flexural strength , izod impact strength test , chemistry , ultimate tensile strength , optics , organic chemistry , physics , optoelectronics
An alternating copolymer of N ‐methylmaleimide and isobutene was produced by a radical precipitation polymerization method. The copolymer thus produced is a new class of transparent polymeric material that shows a unique balance of optical, thermal, and mechanical properties. The visible light transmittance was more than 90% and the stress optical coefficient was smaller than that of polycarbonate, leading to moldings with lower birefringence. The heat deflection temperature of the copolymer was as high as 157°C, and the thermal expansion coefficient was about 30% smaller than those of poly(methyl methacrylate) and polycarbonate. The copolymer showed excellent mechanical properties, specifically, the flexural modulus was the highest among the typical amorphous polymers. © 1996 John Wiley & Sons, Inc.