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.
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
