BN/HDPE导热塑料的热导率  

Thermal Conductive Composite BN/HDPE Plastics

作　　者：周文英[1] 齐暑华[1] 吴有明[1] 王彩凤 袁江龙 郭建 

机构地区：[1]西北工业大学理学院应用化学系,陕西西安710072 [2]西安向阳航天材料有限公司,陕西西安710025

出　　处：《高分子材料科学与工程》2008年第2期83-86,共4页Polymer Materials Science & Engineering

摘　　要：用粉末混合法制备了氮化硼增强高密聚乙烯塑料,研究了材料内部填料分散状态,填料含量,基体粒径和温度对热导率的影响。结果表明,材料中填料粒子围绕在聚乙烯粒子周围,形成了特殊的网状导热通路;增大填料用量和基体粒径,热导率升高;填料体积用量为30%时体系热导率达0.96 W/m.K,是基体热导率的3倍多。用Y.Agari模型分析了基体粒径对形成导热通路的影响。此外,使用氧化铝短纤维和氮化硼混杂填料能获得更高的热导率。The effects of BN filler dispersion status, content, HDPE particle sizes and temperature on the thermal conductivity of BN reinforced HDPE composites prepared using powder mixing were investigated. The results indicate that there exists a special dispersion state of BN particles in HDPE, i. e., BN particles surrounding HDPE matrix particles. With increasing filler content and HDPE size, thermal conductivity increases, and reachs 0.96 W/m·K at 30% （volume fraction） of filler, three times that of pure HDPE. Further, Agari Y model was used to analyze the effect of HDPE size on the formation of conductive chains from filler. In addition, it is found that the combined use of BN particles and alumina short fiber leads to higher thermal conductivity, compared to the BN particles used alone.

关 键 词：高密聚乙烯 氮化硼 热导率 粒径大小 粉末混合 

分 类 号：TQ324.8[化学工程—合成树脂塑料工业]