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材料工程  2008 

HDPE/CB-MWNTs复合材料体系PTC效应

Keywords: 高密度聚乙烯,复合材料,正温度系数效应

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Abstract:

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。

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