文献类型：期刊文献

英文题名：Preparation and Foamability of High Melt Strength Polypropylene Based on Grafting Vinyl Polydimethylsiloxane and Styrene

作者：Zhou, Shuai[1];Zhao, Shicheng[1];Xin, Zhong[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2015

卷号：55

期号：2

起止页码：251

外文期刊名：POLYMER ENGINEERING AND SCIENCE

收录：;EI(收录号：20143600044561);WOS:【SCI-EXPANDED(收录号:WOS:000348427600002)】；

基金：Contract grant sponsor: National Natural Science Funds of China; contract grand number: 21106042; Contract grant sponsor: National Natural Science Funds of China; contract grand number: u1162110; Contract grant sponsor: Fundamental Research Funds for the Central Universities of China.

语种：英文

外文关键词：Blowing agents - Carbon dioxide - Foams - Grafting (chemical) - Plastic products - Silicones - Styrene - Supercritical fluid extraction

摘要：A novel strategy was developed by melt grafting reaction in the presence of macromonomer vinyl polydimethylsiloxane (VS) and comonomer styrene (St) for preparing high melt strength polypropylene (HMSPP), and the rheological behavior, melt strength, and foaming ability of HMSPP were investigated. The results showed that VS and St were successfully grafted onto isotactic polypropylene (iPP), and the melt strength of HMSPP increased by more than 12 times compared to that of the virgin iPP. Moreover, HMSPP exhibited excellent foaming ability with smaller cell size, higher cell density, and higher expansion ratio compared to the virgin iPP when supercritical carbon dioxide was used as the blowing agent. POLYM. ENG. SCI., 55:251-259, 2015. (c) 2014 Society of Plastics Engineers