茂金属聚乙烯/高流动聚乙烯的共混性能  

The Properties of Metallocene Polyethylene Blends with High Melt Index Polyethylene

作　　者：蒋琪[1] 贾红兵[1] 蒋静[1] 房尔园[1] 王经逸[1] 韩宁辉 孙波拉 

机构地区：[1]南京理工大学化工学院,江苏南京210094

出　　处：《塑料》2011年第2期26-28,84,共4页Plastics

摘　　要：研究茂金属聚乙烯(mPE)对高流动聚乙烯(HDPE)流变行为、结晶性能和力学性能的影响。研究结果表明:随着mPE含量增加,共混熔体的表观黏度逐渐升高;温度升高,表观黏度下降,加工性能改善。不同共混比例下结晶度和物理机械性能也发生了变化。当mPE质量含量为10%～15%时,茂金属聚乙烯/高流动聚乙烯共混体系的非牛顿流动行为指数(n)最大;当mPE用量达15%～20%时,共混体系的结晶度最高,综合力学性能最优。The melt rheological behaviors, crystallization morphology and mechanical properties of high melt index （MI） polyethylene blended with metallocene polyethylene were studied. Research results showed that apparent viscosity increased gradually with increasing of mPE content. The apparent viscosity decreased and processing properties improved greatly at high temperature. Crystallinity and mechanical properties also changed hy different mPE content of the blends. The non-newtonian index（n） was maximum at 10 % -15 % percentages of mPE content, while crystallinity and comprehensive mechanical properties became optimum if the content of mPE increased to 15 % - 20 % percentages.

关 键 词：茂金属聚乙烯 高流动聚乙烯 流变行为 力学性能 共混 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]