中国塑料Issue(4)：61-65,5.
相对分子质量对β晶型等规聚丙烯性能的影响
Effect of Relative Molecular Weight on Properties of β-Form Isotactic Polypropylene
董穆 1张丽英 1徐凯 1吕芸 1张师军1
作者信息
- 1. 中国石油化工股份有限公司北京化工研究院,北京100013
- 折叠
摘要
Abstract
Melt flow rate was taken as a rough measure of molecular weight of isotactic polypropylene （Ipp）. Influence of molecular weight on the crystallization behavior, thermal property, and mechanical property of β-form IPP （ β-PP） were studied using differential scanning calorimeter, X-ray diffraction, and mechanical property test. It was observed that after adding/I- nucleating agent, both the crystallization temperature and heat distortion temperature of IPP increased about 10℃, and relative content of β-form crystallization increased to 60%-70 %. The impact strength of β-PP of high molecular weight increased at least 100 % while that of low molecular weight had little improvement. The flexural modulus and flexural strength of β-PP decreased compared with neat IPP; the lower the molecular weight, the more the decrease.关键词
相对分子质量/等规聚丙烯/β晶型/成核剂/熔体流动速率Key words
relative molecular weight/isotactic polypropylene/β-form/nucleating agent/melt flow rate分类
化学化工引用本文复制引用
董穆,张丽英,徐凯,吕芸,张师军..相对分子质量对β晶型等规聚丙烯性能的影响[J].中国塑料,2012,(4):61-65,5.
