HDPE/POE/无机粒子复合材料的制备及性能

Preparation and Properties of HDPE/POE/Inorganic Particle Composite

采用熔融共混的方法,通过无机粒子填充HDPE/POE共混体系制备复合材料。研究了Al粉、Al_2O_3粉、石墨(GP)这3种单一填料以及Al_2O_3/GP、Al/GP共2种复配填料对复合材料的导热导电和流变性能的影响。流变性能表明复合材料的动态模量随着石墨含量的增加而增加,且复合材料的损耗因子(tanδ)逐渐减小。当石墨含量(质量分数)为33%和50%时,复合材料的损耗因子小于1,复合材料内填料形成了网络结构。由于形成了导热导电通路,复合材料的热导率和电导率都得到明显提高。将含量为50%的石墨填充到HDPE/POE基体中,HDPE/POE/GP的导热率是1.8 W/(m·K),是HDPE/POE的5.3倍。

The composite materials were prepared by melt blending method. Different inorganic particles was filled with into the HDPE/POE blending system. The effect of three single fillers-Al powder, Al2O3 powder, graphite（GP） powder and two compound fillers-AL/GP, Al2O3/GP on the thermal conductivity, electric conductivity and rheological properties of the compound material were studied. The rheologieal properties showed that the dynamic modulus of composite increases with the increasing of graphite content, while the loss factor （tamS） of composite decreased gradually. When the graphite content was 33% and 50% , the loss factor was less than 1. It meant that the network structure was formed in the compound materials. The thermal conductivity and electrical conductivity were obviously improved due to the formation of a pathway. The thermal conductivity of HDPE/POE/GP was 1.8 W/（ m·K） with 50% graphite content, which was 5.3 times of HDPE/POE.