Preparation of β-SiCw/BDM/DBA composites with excellent comprehensive properties

摘要

Functionalized β-SiC whiskers (b-SiCw) are employed to prepare β-SiCw/N,N′-4, 4′-bimaleimide diphenyl methane/diallylbisphenol A (b-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 b-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 b-SiCw. Both thermal resistance and dielectric constant are increased with the increasing addition of b-SiCw. For a given β-SiCw loading, the surface functionalization of β-SiCw exhibits a positive effect on the thermal conductivities and mechanical properties of the β-SiCw/BDM/DBA composites.

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