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A new class of transparent polymeric materials. II. Synthesis and properties of poly( N ‐cyclohexylmaleimide‐ alt ‐isobutene) modified with lauryl methacrylate
Author(s) -
Doi Toru,
Ishikawa Noriyuki,
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<859::aid-app19>3.0.co;2-s
Subject(s) - copolymer , maleimide , methacrylate , polymer chemistry , absorption of water , glass transition , materials science , absorption (acoustics) , heat deflection temperature , chemistry , chemical engineering , polymer , composite material , izod impact strength test , engineering , ultimate tensile strength
Transparent polymeric materials with high heat resistance and low water absorption were designed based on the alternating copolymers of N ‐substituted maleimide (RMI) with isobutene (IB). The N ‐substituent of the maleimide significantly affected the glass transition temperature ( T g ) and water absorption of the copolymers. Poly( N ‐cyclohexylmaleimide‐ alt ‐JB) [poly(CHMI‐IB)] showed a T g value as high as 192°C and relatively low water absorption. Furthermore, the incorporation of a small amount of lauryl methacrylate in the copolymers was confirmed to reduce the water absorption of the copolymer drastically, although it decreased the T g of the copolymers at the same time. Poly(CHMI‐IB), containing 4 mol % lauryl methacrylate, showed a good balance of excellent transparency, high heat resistance, acceptable mechanical properties, and low water absorption. The heat deflection temperature was as high as 141°C. The water absorption at 23°C after immersion for 14 days was 0.56% and the dimensional change after 7 days was 0.06%. They are half and one‐quarter of those of poly(methyl methacrylate), respectively. © 1996 John Wiley & Sons, Inc.