文献类型：期刊文献

英文题名：Extrusion foaming behavior of a polypropylene/nanoclay microcellular foam

作者：Wang, Mingyi[1];Xie, Linsheng[1];Qian, Bo[1];Ma, Yulu[1];Zhou, Nanqiao[2]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]South China Univ Technol, Natl Engn Res Ctr Novel Equipment Polymer Proc, Key Lab Polymer Proc Engn, Minist Educ, Guangzhou 510640, Peoples R China

年份：2016

卷号：133

期号：41

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20163002627114);WOS:【SCI-EXPANDED(收录号:WOS:000380728200023)】；

基金：This work was financially supported by the National Natural Science Foundation of China (contract grant number 21206152) and the Beijing Natural Science Foundation (contract grant number 3132007).

语种：英文

外文关键词：composites; extrusion; foams; nanoparticles; nanowires and nanocrystals; porous materials

摘要：With maleic anhydride grafted polypropylene (PP-g-MAH) as a compatibilizer, composites of block-copolymerized polypropylene (B-PP)/nanoclay were prepared. The effects of the PP-g-MAH and nanoclay content on the crystallization and rheological properties of B-PP were investigated. The microcellular foaming behavior of the B-PP/nanoclay composite material was studied with a single-screw extruder foaming system with supercritical (SC) carbon dioxide (CO2) as the foaming agent. The experimental results show that the addition of nanoclay and PP-g-MAH decreased the melt strength and complex viscosity of B-PP. When 3 wt % SC CO2 was injected as the foaming agent for the extrusion foaming process, the introduction of nanoclay and PP-g-MAH significantly increased the expansion ratio of the obtained foamed samples as compared with that of the pure B-PP matrix, lowered the die pressure, and increased the cell population density of the foamed samples to some extent. (C) 2016 Wiley Periodicals, Inc.