MWNTs/HDPE的导电性和流变学性质  

The Electrical and Rheological Properties for MWNTs/HDPE Composites

作　　者：陈西良[1] 付海英[1] 张聪[1] 朱智勇[1] 

机构地区：[1]中国科学院上海应用物理研究所,上海201800

出　　处：《高分子材料科学与工程》2008年第1期87-90,共4页Polymer Materials Science & Engineering

基　　金：中国科学院上海应用物理研究所<人才引进项目>(90120432)资助

摘　　要：利用熔融共混的方法制备了多壁碳纳米管(MWNTs)/高密度聚乙烯(HDPE)导电复合体系,并研究了该体系的流变学性质和导电性质。流变测量结果表明,碳纳米管的加入使体系的黏度和模量有很大的提高,并且高填充含量时复合体系的黏度表现出强剪切变稀行为,而储能模量则在低频区出现所谓的"第二平台";从黏度、损耗模量随填充含量的变化图上可以看出,碳纳米管的质量分数达到8%时,黏度和损耗模量随含量增加的幅度明显增大,表明在该点形成了粘弹逾渗结构,该值和电阻测量得到的逾渗阈值相近。The electrical and rheological properties of MWNTs/HDPE composites prepared by melt mixing process were studied. Rheological results indicate that the storage modulus and complex viscosity of the material increase dramatically when incorporated with MWNTs. Strong shear thinning behavior is observed at high filler concentration accompanied with the appearance of the so-called ＂second plateau＂ in the low frequency region. From the MWNTs concentration dependence of storage modulus and complex viscosity, it is concluded that the viscoelastic percolation structure begins to form around 8% （mass fraction）, a value which is very close to the percolation threshold obtained for electrical conductance measurements.

关 键 词：多壁碳纳米管 高密度聚乙烯 逾渗阈值 流变 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]