石墨填充高密度聚乙烯基复合材料导热性能的研究  

Studies on the Thermal Conductivity of HDPE/C Composites

作　　者：王琪[1] 高峻[1] 王茹[1] 华正坤[1] 

机构地区：[1]四川大学高分子研究所,成都610065

出　　处：《高等学校化学学报》1999年第9期1480-1482,共3页Chemical Journal of Chinese Universities

基　　金：中国石油化工科技开发公司;四川省科委应用基础研究基金;四川大学青年基金

摘　　要：选用导热系数较高的无机填料石墨对高密度聚乙烯（HDPE）进行填充改性；采用偶联剂和磨盘型力化学反应器对石墨进行表面处理，提高石墨与聚合物基体的界面相互作用；用自行研制的升温速率测定装置测试材料的导热性能，并研究材料的导热机理；用SEM观察复合材料的微观形态．实验结果表明：经偶联剂处理后，石墨在HDPE中均匀分布；测试试样的上表面温度随时间的变化可用三次多项式T=A0+A1t+A2t2＋A3t3拟会；HDPE／石墨复合材料升温速率随石墨含量增加而增大；石墨含量为35％的复合材料最大升温速率为HDPE的1.75倍．Thermal conductivity of HDPE/C composites and its mechanism were studied through SEM and thermal conductivity measurement. The results show that after being treated with coupling agent through pan-milling, the graphite particles will uniformly disperse in HDPE matrix, the interface interaction between graphite and HDPE enhances quite a lot.The temperature detected on the sample surface vs. time shows an excellent agreement with third-polynomial regression: T = A0+ A1t + A2t2 + A3t3.The thermal conductivity of HDPE/C is much higher than that of HDPE, the temperature-increasing rate of HDPE/C(65/35) composite reaches 1. 75 times of that of HDPE.

关 键 词：HDPE 石墨 导热性 复合材料 高密度聚乙烯 

分 类 号：O632.12[理学—高分子化学]