A new class of transparent polymeric materials. I. Production and properties of an alternating copolymer of N-methylmaleimide and isobutene

✍ Scribed by Toru Doi; Yoshihiko Sugiura; Satoshi Yukioka; Akira Akimoto

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 457 KB
• Volume: 61
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19960801)61:5<853::aid-app18>3.0.co;2-y

✦ Synopsis

SYNOPSIS

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(methy1 methacrylate) and polycarbonate. The copolymer showed excellent mechanical properties, specifically, the flexural modulus was the highest among the typical amorphous polymers. 0 1996 John Wiley & Sons, Inc.