Synthesis and applications of triblock and multiblock copolymers using telechelic oligopropylene |
| |
Authors: | Daisuke Sasaki Yoshihiro Suzuki Shoichiro Yano |
| |
Affiliation: | a Research and Development Division, San-ei Kogyo Corporation, 3-347 Togasaki, Misato-shi, Saitama 341-0044, Japan b Department of Materials and Applied Chemistry, College of Science and Technology, Nihon University, 1-8-14 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8308, Japan |
| |
Abstract: | Isotactic polypropylene (iPP)-polystyrene (PS) and iPP-poly(methyl methacrylate) (PMMA) multiblock copolymers were synthesized by atom transfer radical coupling (ATRC) of PS-iPP-PS and PMMA-iPP-PMMA triblock copolymers obtained by atom transfer radical polymerization (ATRP) of styrene (St) and methyl methacrylate (MMA), respectively, using α,ω-dibromoisobutyrateoligopropylene (iPP-Br) as a bifunctional macroinitiator. The iPP-Br was prepared by hydroxylation and subsequent esterification of telechelic oligopropylene having terminal vinylidene double bonds at both ends obtained by controlled thermal degradation of iPP. ATRP of St and (meth) acrylic monomers using iPP-Br formed the corresponding triblock copolymers. It was confirmed that the PMMA-iPP-PMMA triblock copolymer was effective as the compatibilizer for the iPP/PMMA blend. An iPP-PS multiblock copolymer (Mn: 25?000 g/mol and Mw/Mn: 4.1) was prepared by ATRC of PS-iPP-PS triblock copolymer (Mn: 8900 g/mol and Mw/Mn: 1.3). ATRC with St of PMMA-iPP-PMMA triblock copolymer (Mn: 13?000 g/mol and Mw/Mn: 1.4) provided an iPP-PMMA multiblock copolymer containing St chains (Mn: 39?000 g/mol and Mw/Mn: 2.8). |
| |
Keywords: | Telechelic oligopropylene Atom transfer radical polymerization Multiblock copolymer |
本文献已被 ScienceDirect 等数据库收录! |
|