Preparation of high thermal conductivity composites by composite filling PPS with corundum alumina and flake BN
Polyphenylene sulfide(PPS)was used as polymer matrix,corundum alumina and a small amount of flake boron nitride(BN)as composite thermal conductive filler to prepare Al2O3/PPS/BN high thermal conductivity composites via low temperature and high pressure molding process.The effects of PPS content,particle size and content of filler on thermal conductivity and mechanical properties of the composites were studied.A preparation process of high thermal conductivity Al2O3 composite material was determined.The morphology,thermal conductivity and mechanical properties of the samples were systematically studied by scanning electron microscope,thermal conductivity measuring instrument and universal testing machine.The results show that the thermal conductivity of the composites is 5.44 W/(m·K),21.76 times than that of epoxy resin when the mass fraction of Al2O3,BN and PPS are 89%,3%,8%respectively.The mechanical properties of the composites are excellent.
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