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以膨胀石墨(EG)为导热填料,利用先开炼后模压的成型方法,制备膨胀石墨(EG)增强聚氯乙烯(PVC)导热复合材料,考察了含量变化对板材微观结构、导热系数、拉伸性能、弯曲性能的影响,并与其他成型方法进行对比分析。结果表明,膨胀石墨以石墨微片存在于树脂基体中,并随着含量的增加逐渐增强板材的导热性;填充膨胀石墨在增大板材刚度的同时,也会降低板材的拉伸强度和弯曲强度,当膨胀石墨含量为15%时力学强度最优。
In this paper, expanded graphite (EG) was used as thermal conductive filler, and expanded graphite (EG) reinforced PVC thermal conductive composite was prepared by the first open-molding method after molding. The effects of content on the microstructure, thermal conductivity, Elongation performance, bending performance, and compared with other forming methods. The results show that graphite is present in the resin matrix with graphite microtablets and gradually increases the thermal conductivity of the sheet as the content of graphite increases. When the expanded graphite is filled, the tensile strength and flexural strength of the sheet are also decreased When the content of expanded graphite is 15%, the mechanical strength is the best.