文献类型：期刊文献

中文题名：纳米碳酸钙改性聚丙烯共聚物的非等温结晶动力学

英文题名：NON-ISOTHERMAL CRYSTALLIZATION KINETICS OF POLYPROPYLENE COPOLYMER MODIFIED WITH NANO-CALCIUM CARBONATE

作者：张广平[1];朱维平[2];李发学[1];俞建勇[1];戴干策[2]

机构：[1]东华大学纺织学院,上海200051;[2]华东理工大学聚合物加工研究室,上海200237

年份：2004

卷号：20

期号：1

起止页码：157

中文期刊名：高分子材料科学与工程

外文期刊名：Polymer Materials Science & Engineering

收录：CSTPCD;;Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：聚丙烯;纳米碳酸钙;原位聚合;非等温结晶动力学;成核剂

外文关键词：polypropylene copolymer; in-situ polymerization; nucleating agent; nano-calcium carbonate; non-isothermal crystallization kinetics

摘要：用DSC手段考察了反应釜内原位共聚制备的含有成核剂及纳米碳酸钙的聚丙烯(PP)共聚物的非等温结晶行为。结果表明,成核剂使PP共聚物的结晶温度升高,结晶度降低,结晶速率略有提高。而纳米碳酸钙则大幅提高了PP共聚物的结晶温度和结晶速率,结晶度也增加了约10%。并采用Ozawa法和Caze法描述了非等温结晶动力学。
Non-isothermal crystallization behavior of reactor-made polypropylene (PP) copolymer with or without a nucleating agent and/or nano-calcium carbonate was investigated by means of differential scanning calorimeter (DSC). The results show that PP copolymer with the nucleating agent exhibites a higher crystallization temperature, a slightly higher crystallization rate in terms of the half time and a lower degree of crystalline. But addition of nano-calcium carbonate to PP copolymer greatly increased crystallization temperature and crystallization rate, and degree of crystalline is increased by about 10%, thus being in favor of improving mechanical properties. The Ozawa theory and Caze method were employed to describe the non-isothermal crystallization kinetics.