导热绝缘聚乙烯电缆料的制备与性能  

Preparation and Performance of Thermally Conductive Insulating Polyethylene Cable Material

作　　者：邱庚锐 滕贺 宋宝 吴傲 李维淼 周正发 Qiu Gengrui;Teng He;Song Bao;Wu Ao;Li Weimiao;Zhou Zhengfa(Hefei University of Technology,Department of Chemistry and Chemical Engineering,Hefei 230009,China)

机构地区：[1]合肥工业大学化学与化工学院,安徽合肥230009

出　　处：《广东化工》2020年第23期23-25,共3页Guangdong Chemical Industry

基　　金：安徽省科技重大专项,18030901072。

摘　　要：导热填料氧化铝(Al2O3)和硅微粉用钛酸酯偶联剂表面处理,与低密度聚乙烯(LDPE)熔融共混制备导热绝缘聚乙烯电缆料,研究了填料的含量、种类以及表面改性对复合材料导热系数、力学性能和电绝缘性能的影响。结果表明:随着填料用量的增加,复合材料的导热系数增加,而熔融指数、电绝缘性能和力学性能下降;填料的表面改性有效改善了复合材料的相容性。在填料用量45%时,硅微粉与Al2O3质量比为1∶1,复合材料的综合性能良好,其缺口冲击强度为29.4 kJ/m2,融熔指数为3.05 g/10 min,拉伸强度为12.9 MPa,击穿电压为34.24 kV/mm。After surface treatment of thermally conductive filler alumina(Al2 O3) and silica powder with titanate coupling agent, they were melt blended with low-density polyethylene(LDPE) to prepare thermally conductive polyethylene composites. The content of fillers, The effect of type and surface modifier on the thermal conductivity, mechanical properties and electrical insulation properties of composite materials. The results show that with the increase of the filler content, the thermal conductivity increases, while the melt index, electrical insulation performance and mechanical properties decrease;the addition of surface modifiers effectively improves the compatibility of the composite. When the filler content is 45 %, the mass ratio of silicon powder to Al2 O3 is 1∶1, and the overall performance of the composite material is good. Its notched impact strength is 29.4 kJ/m2, and the melting index is 3.05 g/10 min. The strength is 12.9 MPa, and the breakdown voltage is 34.24 kV/mm.

关 键 词：聚乙烯 三氧化二铝 硅微粉 导热 绝缘 

分 类 号：TQ[化学工程]