文献类型：会议论文

英文题名：Effect of Nano-clay on Rheological and Extrusion Foaming Process of a Block-Copolymerized Polypropylene

作者：Wang, Mingyi[1];Bo, Qian[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, Guangdong, Peoples R China

会议论文集：International Symposium on Materials Application and Engineering (SMAE)

会议日期：AUG 20-21, 2016

会议地点：Chiang Mai, THAILAND

语种：英文

摘要：The effects of nano-clay and the corresponding coupling agent maleic anhydride grafted polypropylene (PP-g-MAH) on thermal properties, rheological properties and extrusion foaming process of a block-copolymerized polypropylene (B-PP) were studied. Supercritical CO2 (SC CO2) was used as the foaming agent with a concentration of 5wt%. Each step of foamed B-PP/ PP-g-MAH/ nano-clay composites processing is addressed, including mixing of the composites, manufacture of the composites, foaming process of the composites and characterization of the cell structure. The results showed that incorporation of nano-clay and PP-g-MAH caused reduced melt strength and complex viscosity of B-PP. However, the heterogeneous nucleation induced by nano-clay and PP-g-MAH improved the maximum foaming expansion ratio and cell-population density of B-PP foam.