HDPE／BN复合材料的热导率  

Thermal conductivity of HDPE/BN composite plastic

作　　者：周文英[1] 齐暑华[1] 邵时雨[1] 吴有明[1] 

机构地区：[1]西北工业大学理学院应用化学系,陕西西安710072

出　　处：《合成树脂及塑料》2007年第1期68-71,共4页China Synthetic Resin and Plastics

摘　　要：研究了高密度聚乙烯(HDPE)／氮化硼(BN)复合材料中BN分散状态、含量及粒径对热导率的影响。用粉末混合法制得的复合材料中BN粒子围绕在HDPE粒子周围,形成特殊的网状导热通路,在(?)(BN)为30％时复合材料的热导率达1．20 W／(m·K),是纯HDPE的4倍。随BN粒径减小,复合材料的热导率升高,小粒子在基体中形成导热通路能力优于大粒子。HDPE／BN复合材料具有优良的电绝缘性能和机械性能。The effects of dispersion state, content and particle sizes of boron nitride（BN） filler on thermal conductivity of the BN reinforced high density polyethylene （HDPE） composite material were investigated. In the composite HDPE/BN prepared by powder mixing process, the BN particles surrounding HDPE microphase acted as special heat passages in reticular form. In case of adding 30% mass fraction of BN, the thermal conductivity of HDPE/BN could reach 1.20 W/（m. K） or 4 times that of pure HDPE. Furthermore, the thermal conductivity of HDPE/BN rose with the reduction in particle size of BN, because the smaller particles possessed an advantage in forming heat conductive passage in matrix over the larger particles. The composite material containing 30 vol. % BN exhibited superior electrical insulation and mechanical properties.

关 键 词：高密度聚乙烯 氮化硼 热导率 粒径 粉末混合 

分 类 号：TQ325.8[化学工程—合成树脂塑料工业]