A COMPARATIVE STUDY ON THE THERMAL CONDUCTIVITY OF ALUMINUM OXIDEREINFORCED POLYMER MATRIX COMPOSITES

摘要

In this study, comparative studies on the thermal conductivity of the guarded heat flow meter and laser flash method were employed and discussed in detail. For the Al_2O_3-filled PA6 composites, the compounds containing Al_2O_3, ND and CNT additives were fabricated and hot-pressed. As a result, the thermal stability and conductivity of composites increased with increasing filler content; high filler content built more thermally conductive paths than low filler content. Al_2O_3 and ND particles combined obtained higher thermal conductivity of 2.211 W/mK. In short, it obviously showed sample thickness dependence of the composites; thinner is higher thermal conductivity. In addition, the enhancement to thermal conductivity by CNTs was larger than that to thermal conductivity by NDs.