导热SiC/LLDPE复合塑料制备及性能研究  

Preparation and Properties of Thermal Conductive SiC/LLDPE Composite Plastics

作　　者：任文娥[1] 周文英[1] 武鹏[2] 赵粉娟[3] 吴广文[3] 

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049 [2]西北工业大学理学院应用化学系,陕西西安710072 [3]西安交通大学理学院应用化学系,陕西西安710049

出　　处：《塑料》2009年第3期56-60,共5页Plastics

摘　　要：采用碳化硅(S iC)和线性低密度聚乙烯(LLDPE)粒子经粉末混合和热压成型制得导热复合塑料。研究了S iC粒子含量对LLDPE熔融温度、结晶度、热导率、介电及力学性能的影响。结果表明:S iC粒子降低了LLDPE结晶度,对熔融温度无明显影响;随S iC含量增加,热导率升高,介电常数和损耗升高,但仍然保持在较低数值,而力学性能下降。A thermally conductive composite plastics was obtained form a particles mixture of silicon carbide （SiC） and linear low-density polyethylene （LLDPE） by a powder mixing and hot press molding. The effects of SiC content on the melting temperature, crystallinity, thermal conductivity, dielectric and mechanical properties were investigated. The results demonstrated that the useing of SiC decreased the crystallinity of LLDPE,and had no significant influence on the melting temperature. As an increasing in SiC concentration, the thermal conductivity rose, the dielectric constant and loss increased, however, they still remained relatively low values. The mechanical properties of filled LLDPE obviously decreased with increasing the content of SiC.

关 键 词：线性低密度聚乙烯 碳化硅 热导率 介电性能 粉末混合 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业] TB39[一般工业技术—材料科学与工程]