文献类型：期刊文献

英文题名：A Novel Composite Coupled Hardness with Flexibleness-Polylactic Acid Toughen with Thermoplastic Polyurethane

作者：Hong, Hua[1,2];Wei, Jie[1,2];Yuan, Yuan[1,2,3];Chen, Fang-Ping[1,2];Wang, Jing[1,2,3];Qu, Xue[1,2];Liu, Chang-Sheng[1,2,3]

机构：[1]E China Univ Sci & Technol, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Engn Res Ctr Biomed Mat, Minist Educ, Shanghai 200237, Peoples R China;[3]E China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China

年份：2011

卷号：121

期号：2

起止页码：855

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20111513901524);WOS:【SCI-EXPANDED(收录号:WOS:000289355500031)】；

基金：Contract grant sponsor: Program for Changjiang Scholars and Innovative Research Team in University and the State Key Program of National Natural Science of China; contract grant number: 50732002.

语种：英文

外文关键词：polylactic acid; thermoplastic polyurethane; brittle; mechanical properties; rheology

摘要：With the aim to modify the brittleness of polylactic acid (PLA), it was firstly melt blended with thermoplastic polyurethane (TPU) at six different PLA wt % of 100, 90, 80, 70, 60, and 50 compositions. The properties of PLA/TPU composite were characterized by means of electron microscopy, rheological, mechanical and thermal methods. The results showed that the brittle fracture of pure PLA was gradually transformed into ductile fracture with the addition of the TPU elastomer. The notched impact strength of the composite at 10 wt % TPU was over three times higher than that of pure PLA. The composite was found to be a partially miscible system with shifted glass transition temperatures. The molten blend was shear-thinning fluid and it could be processed by conventional thermoplastic processes such as extrusion and injection molding. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 121: 855-861, 2011