文献类型：会议论文

英文题名：Influence of lanthanum stearate on the crystallization behavior of isotactic polypropylene

作者：Guo, Xiaojing[1]; Zhao, Shicheng[1]; Xin, Zhong[1]

机构：[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

会议论文集：Chemical engineering in sustainable development Guest Editors: Xuhong Guo and Qingshan Zhu

语种：英文

外文关键词：Crystallization kinetics - Isotherms - X ray scattering - Cooling - Differential scanning calorimetry - Polypropylenes

摘要：The influence of a nucleating agent, lanthanum stearate (LaSt), on the crystallization behavior of isotactic polypropylene (iPP) was investigated using differential scanning calorimetry (DSC), polarized optical microscopy (POM) and wide-angle x-ray scattering (WAXD). It was found that LaSt can act as a ?-nucleating agent and induce the formation of a high content of ?-form during the crystallization of iPP. The content of ?-form is greatly affected by crystallization temperature and cooling rate. High crystallization temperature and low cooling rate are favorable to the formation of ?-form. The results of isothermal crystallization kinetics show that LaSt shortens the crystallization half time (t1/2) and accelerates the crystallization of iPP. ? 2009 Curtin University of Technology and John Wiley & Sons, Ltd.