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聚丙烯/氧化锌导热复合材料的制备与性能研究 被引量:7

Study on Properties of Polypropylene/Zinc Oxide Thermal Conductive Composites and Its Preparation
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摘要 采用粒径为3μm和40μm复配的氧化锌粉体为导热填料以改善粉体在聚丙烯(PP)中的堆积密实度,以PP接枝马来酸酐为相容剂,与PP共混塑化,制备出PP/氧化锌导热复合材料,并对该导热复合材料的性能进行了研究。结果表明:当3μm和40μm氧化锌质量比为1:3、且总添加量为40%(体积分数)时,所得复合材料的热导率达到1.83 W/(m?K),热扩散系数为0.93×10-6 m2/s;相对于单一添加3μm或40μm粉体时,前者分别提高了15.8%和7.0%,后者分别提高了17.7%和12.0%;同时导热复合材料的体积电阻率、介电特性、力学性能和热稳定性均能满足对绝缘导热材料的要求。 The mixture of zinc oxide zinc oxide powder with different particle size 3 μm and 40 μm was added into polypropylene to enhance the stacking density of mixture in PP; anhydride grafted polypropylene was used as compatibilizer, PP/zinc oxide thermal conductive composites were prepared, and then the properties of the composites were investigated. The results show that when the mass ratio of 3-micron to 40-micron zinc oxide is 1:3 and the total loading volume fraction is 40%, the thermal conductivity of the resultant composites is up to 1.83 W/(m?k) and the thermal diffusion coefficient 0.93×10^-6 m^2/s, the former increases by 15.8% or 7.0%, and the latter increases by 17.7% or 12.0% respectively, compared to that of the loading case of single particle size 3-micron or 40-micron zinc oxide. The volume resistivity, dielectric properties, mechanical properties and thermal stability can well meet requirements as insulating and thermal conductive material.
作者 廖俊 姜宏伟
出处 《塑料科技》 CAS 北大核心 2014年第8期83-87,共5页 Plastics Science and Technology
关键词 聚丙烯 氧化锌 热导率 绝缘 Polypropylene Zinc oxide Thermal conductivity Insulating
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