摘要
通过双螺杆混炼挤出造粒,制备了加有不同添加量的化学降解改进剂的一系列试样,采用凝胶渗透色谱(GPC),HAAKE流变仪等,研究了IPP经化学降解后的相对分子质量、分子量分布,讨论了化学降解IPP分子量分布变窄的机理,分析了熔体在相对静止状态及受力流动时分子运动及流变性能的影响因素。
A series of chemical degraded IPP samples were prepared with twin screw blend machine. Their molecular weight, distribution of molecular weight and rheological behaviour have been studied with GPC and HAAKE rheogonimeter. The mechanism of MWD changing to narrower of IPP after chemical degradation is discussed. The effects on rheological behaviour and on molecular movement when melt is in relative static condition or is flowing at pressure are analyzed. It is discovered that the effects of chemical degradation on reological behaviour and on MWD are similar in the mechanism to a certain respect.
出处
《华东理工大学学报(自然科学版)》
CAS
CSCD
北大核心
1999年第6期591-594,共4页
Journal of East China University of Science and Technology
关键词
等规聚丙烯
化学降解
流变性能
聚丙烯
isotactic polypropylene
chemical degradation
mechanism
rheological behaviour