林产化学与工业Issue(3)：60-64,5.DOI:10.3969/j.issn.0253-2417.2014.03.011
聚丙烯酸酯微球的制备及其增韧聚乳酸的研究
Preparation of Polyacrylate Microsphere and Its Application in Toughening of Polylactic Acid
摘要
Abstract
Polyacrylate microspheres with different cross-linking degrees of core were prepared by semi-continuous seed emulsion copolymerization using butyl acrylate( BA) and methyl methacrylate ( MMA) as main monomers. The mass ratios of BA and MMA in core and in shell were 9:1 and 1:9 respectively. The synthesized polyacrylate microspheres were then dried and used to toughen polylactic acid ( PLA) . The effect of content and cross-linking degree of core of polyacrylate microsphere ( ACR) with core-shell structure on mechanical properties of PLA were studied. The results showed that the impact strength of PLA was increased with the increase of ACR content. It was found that when the ACR cotent was 10%, the impact strength of the blend was about 1. 5 times as large as the pure PLA. The elongation at break was increased from 2% to 11%, whereas the tensile strength loss of PLA had little change, when it was compared with that of non-toughened PLA. It was also observed that the tensile strength loss of PLA decreased slightly as the increase of cross-linking degree of core, while the impact strength increased obviously. When the cross-linking degree of core was 4%, the impact strength increased about 2 times larger than that of non-toughened PLA and tensile strength was only decreased by 7%. Therefore, 10% of ACR content and 4% of cross-linking degree of core were considered as the optimal ratio for good toughening of PLA.关键词
聚丙烯酸酯/聚乳酸/增韧Key words
acrylate/PLA/toughening分类
化学化工引用本文复制引用
宋晓丽,陈莹,许玉芝,王春鹏..聚丙烯酸酯微球的制备及其增韧聚乳酸的研究[J].林产化学与工业,2014,(3):60-64,5.基金项目
国家国际科技合作专项项目(2011DFA32440) （2011DFA32440）
国家自然科学基金资助项目(31200448) （31200448）
