文献类型：期刊文献

英文题名：Crystallization behavior and mechanical properties of polypropylene copolymer by in situ copolymerization with a nucleating agent and/or nano-calcium carbonate

作者：Zhu, WP; Zhang, GP; Yu, JY; Dai, G

机构：[1]Donghua Univ, Coll Text, Shanghai 200051, Peoples R China;[2]E China Univ Sci & Technol, Polymer Proc Lab, Shanghai 200237, Peoples R China

年份：2004

卷号：91

期号：1

起止页码：431

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000186915100060)】；

语种：英文

外文关键词：poly(propylene) (PP); copolymerization; nanocomposites; nucleation; crystallization

摘要：The crystallization behavior of polypropylene (PP) copolymer obtained by in situ reactor copolymerization with or without a nucleating agent and/or nano-CaCO3 particles was investigated both by thermal analysis and by polarized light microscopy. The Avrami model is successfully used to describe the crystallization kinetics of the studied copolymer. The results of the investigation show that a dramatic decrease of the half-time of crystallization t(1/2) as well as a significant increase of the overall crystallization rate, are observed in the presence of the nucleating agent. These effects are further promoted in the presence of the nano-CaCO3 particles. The incorporation of the nucleating agent and nano-CaCO3 particles into PP copolymer remarkably improved the mechanical properties and heat distortion temperature. (C) 2003 Wiley Periodicals, Inc. J Appl Polyrn Sci 91: 431-438, 2004.