Preparation of β-SiCw/BDM/DBA Composites With Excellent Comprehensive Properties

摘要

Functionalized β-SiC whiskers (β-SiCw) are employed to prepare β-SiCw/N,N'-4, 4-bimaleimide diphenyl methane/diallylbisphenol A (β-SiCw/BDM/DBA) composites via powder blending-casting method. The thermal conductive coefficient of the β-SiCw/BDM/DBA composites is 0.994 W/mK with 40 wt% functionalized β-SiCw, five times higher than that of pure BDM/DBA. The mechanical properties of the β-SiCw/BDM/DBA composites are optimal with 10 wt% functionalized β-SiCw. Both thermal resistance and dielectric constant are increased with the increasing addition of β-SiCw. For a given β-SiCw loading, the surface func-tionalization of β-SiCw exhibits a positive effect on the thermal conductivities and mechanical properties of the β-SiCw/BDM/DBA composites.