文献类型：期刊文献

英文题名：Morphological structure and mechanical properties of polyurethane modified with methyl methacrylate

作者：Wang, ZQ; Shi, LY; Zhang, ZP

机构：[1]E China Univ Sci & Technol, Shanghai 200237, Peoples R China

年份：1998

卷号：68

期号：8

起止页码：1363

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000073164300019)】；

语种：英文

外文关键词：polyurethane; polymethyl methacrylate; interpenetrating polymer network; block copolymer; structural behavior

摘要：Three kinds of polyurethane-poly(methyl methacrylate) (PU-PMMA), that is, linear polymer, block copolymer, and interpenetrating polymer network (IPN), were synthesized by a simultaneous polymerization process, respectively. The effects of several factors such as ultraviolet (UV) setting, heat setting, chemical composition, and physical structure on the morphological structure and mechanical properties of polymers were studied by scanning electron micrograph, dynamic mechanical loss spectrum, and mechanical tests. The results show that PU-PMMA is a partially compatible system with a two-phase structure; the linear polymer has the highest elongation at break, and IPN has the strongest tensile strength, while the block copolymer has poor mechanical properties. In addition, the UV setting block copolymer and IPN system, with regular microphase domain structures, have higher tensile strength and elongation at break than those of heat setting polymers. With MMA content and hard segment in PU increasing, the tensile strength increases, and the elongation decreases. (C) 1998 John Wiley & Sons, Inc.