摘要
为获得导热性能更好的聚乙烯基复合材料,采用碳化硅和氮化铝高导热填料填充线性低密度聚乙烯,对碳化硅和氮化铝进行表面处理后,采用压缩成型工艺分别将其与线性低密度聚乙烯粉末一起压缩固化成标准试样,并使用示差扫描量热仪和同步热分析仪进行分析。结果显示:适当质量的酞酸酯基偶联剂可使复合材料获得最好的力学性能,当碳化硅的体积分数大于30%时,热导率达到约0.8%,是未处理的线性低密度聚乙烯的2倍以上;当氮化铝的体积分数大于50%时,热导系数达到约0.88W/(m·K),是未处理的线性低密度聚乙烯的3倍以上。不同类别填充物自身的导热性能对复合材料的热性能有着很大的影响,可为制备新型导热高分子复合材料提供新的思路,更好地满足社会需求。
In order to obtain better thermal conductivity composite materials,silicon carbide and aluminum nitride thermal conductive fillers were selected to fill linear low-density polyethylene in this paper.After surface treatment of silicon carbide and aluminum nitride,the compression molding process is used to compress and solidify the sample together with linear low density polyethylene powder,and analyzed by differential scanning calorimeter and synchronous thermal analyzer.The results show that:appropriate quality phthalate coupling agent can make the composite material get the best mechanical properties.When the volume fraction of silicon carbide is greater than 30%,the thermal conductivity reaches about 0.8%,which is more than twice that of an untreated linear low density polyethylene.When the volume fraction of aluminum nitride is greater than 50%,the thermal conductivity coefficient reaches about 0.88 W/(m·K)which is three times that of untreated linear low-density polyethylene.Both have significantly improved the thermal conductivity of ordinary linear low density polyethylene.In summary,the thermal conductivity of different types of fillers has a great impact on the thermal performance of composite materials,which can provide a new idea for preparing new thermally conductive polymer composites to better meet social needs.
作者
陈继兵
王宇杰
CHEN Ji-bing;WANG Yu-jie(School of Mechanical Engineering,Wuhan Polytechnic University,Wuhan 430023,China)
出处
《武汉轻工大学学报》
2020年第4期38-41,共4页
Journal of Wuhan Polytechnic University
基金
湖北省教育厅科研计划研究重点项目(D20191606)。
关键词
线性低密度聚乙烯
导热性能
制备
性能分析
linear low density polyethylene
thermal condictivity
preparation
performance analysis
