茂金属聚乙烯/高流动性聚丙烯流变行为研究  

Rheological Behavior of High-Fluid Polypropylene Modified With Metallocene Polyethylene

作　　者：陈杰[1] 贾红兵[1] 陈明华[2] 蒋琪[1] 

机构地区：[1]南京理工大学教育部软化学和功能材料重点实验室,江苏南京210014 [2]中国石化扬子石油化工有限公司塑料厂,江苏南京210048

出　　处：《现代塑料加工应用》2012年第3期12-15,共4页Modern Plastics Processing and Applications

摘　　要：为改善高流动性聚丙烯(HF-PP)的性能,采用茂金属乙烯-己烯共聚物(mEHC)和茂金属乙烯-丁烯-己烯三元共聚物(mEBHC)进行改性,通过熔融共混法制得mEHC/HF-PP和mEBHC/HF-PP共混物。研究了mEHC和mEBHC对HF-PP熔体流动速率和流变行为的影响。结果表明,mEHC/HF-PP和mEBHC/HF-PP共混物的非牛顿指数小于1;随着共混物中mEHC和mEBHC含量的增加,共混物的熔体流动速率下降,表观黏度逐渐升高;mEHC/HF-PP和mEBHC/HF-PP比纯HF-PP具有更强的黏温敏感性。To improve the property of high-fluid polypropylene（HF-PP）, HF-PP was modified with metallocene ethylene-hexene copolymer（mEHC） and metallocene ethylene- butene-hexene copolymer （mEBHC）, respectively, mEHC/HF-PP and mEBHC/HF-PP composites were prepared through mechanical blending and the effect of mEHC and mEBHC on melt flow rate and theological behavior of HF-PP. The results show that the non-newtonian index of mEHC/HF-PP and mEBHC/HF-PP composites are less than 1. With the content of mEHC and mEBHC increasing, the melt flow rate of the composites decreases and the apparent viscosity increases. Both of mEHC/HF-PP and mEBHC/HF-PP have a stronger sensitivity of viscosity on temperature than that of pure HF-PP.

关 键 词：茂金属聚乙烯 高流动性聚丙烯 熔体流动速率 流变行为 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]