HDPE/CB-MWNTs复合材料体系PTC效应  

PTC Effect of HDPE/CB-WMNTs Composites

作　　者：易回阳[1] 陈芳[1] 罗四清[1] 

机构地区：[1]湖北师范学院化学与环境工程学院,湖北黄石435002

出　　处：《材料工程》2008年第10期43-45,49,共4页Journal of Materials Engineering

基　　金：湖北省教育厅重点科研资助项目(D200622004)

摘　　要：研究了高密度聚乙烯/碳黑-多壁碳纳米管复合材料的正温度系数效应(PTC)。结果发现,HDPE/CB-MWNTs复合材料中MWNTs的含量为1%(质量分数,下同)时复合材料的PTC强度达8.3,室温电阻率仅为1.2Ω.m;而当MWNTs的含量为3%时复合材料的PTC强度迅速减小到小于3,室温电阻率则变化不大。SEM研究表明导电填料CB或者MWNTs在复合材料中分布均匀。对HDPE/CB-MWNTs复合材料的PTC效应随MWNTs含量的变化原因进行了探讨。The positive temperature coefficient effect and mechanical of a high-density polyethylene / carbon black-multi-walled carbon nanotube composites are reported. The results showed that, the PTC intensity of HDPE/CB-MWNTs composites with 1 % （mass fraction,the same below） MWNTs is 8.3, and the room temperature resistance is only 1.2 Ω· m; but for the 3% MWNTs, the composites PTC intensity reduced to less than 3 rapidly, and the room temperature resistance is little changed. SEM showed the conductive filler CB or MWNTs in composites is evenly distributed. The reasons of PTC intensity of HDPE/CB-MWNTs composite changes with the content of MWNTs were discussed.

关 键 词：高密度聚乙烯 复合材料 正温度系数效应 

分 类 号：TB34[一般工业技术—材料科学与工程] TB33