玻纤增强PPS/Al_2O_3复合材料导热性能的研究

Thermal Conductivity of PPS/Al_2O_3 Composites Strengthened with Glass Fiber

采用玻璃纤维（GF）增强聚苯硫醚（PPS）/微米级氧化铝（Al2O3）导热体系,通过改变GF的用量制备了系列PPS/GF/Al2O3复合材料,研究了GF引起的导热系数变化规律。利用热扩散系数的变化,探讨了GF对Al2O3粒子导热网络形成的桥接作用。结果表明,当Al2O3的用量为40%-50%时,PPS/GF/Al2O3复合材料中Al2O3粒子间距适中,GF在Al2O3粒子之间导热桥接作用明显。PPS/GF/Al2O3复合材料淬断面形貌的扫描电镜照片佐证了上述结果。

Glass fiber（ GF） was employed for strengthening polyphenylene sulfide（ PPS）/alumina（Al2O3） composites.A series of PPS/GF/Al2O3 composites was prepared by varying the amount of GF and thermal conductivity of the composites was measured.Thermal diffusion coefficient was employed for characterizing the heat-transfer effect of GF on Al2O3 particles.The results showed that GF had obvious bridge connection effect on the thermal conduction of Al2O3 particles when mass fraction of Al2O3 was in the range of40% - 50% due to a proper distribution of Al2O3 particles in the PPS matrix,resulting higher thermal conductivity,which was further confirmed by SEM of the fracture section of PPS/GF/Al2O3.