Abstract:Polyamide 6/hexagonal boron nitride(PA6/BN) composites were firstly prepared by melt blending. After determining the optimal dosage of BN according to the thermal conductivity of the composites, carbon nanotubes and compatilizer were further introduced into the PA6/BN blends. The thermal conductivity test, DSC, DMA and SEM were carried out to investigate effects of CNTs/BN hybrids on properties of the PA6 composites, and the corresponding three-dimensional heat transfer models were proposed to explain their thermal conduction mechanism. The results show that CNTs/BN(2%/20.83%) hybrids could dramatically enhance the thermal conductivity of the PA6 composites, the thermal conductivity value is 0.76 W/(m·K), 2.45 times of pure PA6. Meanwhile, the DMA results and SEM images agree well with the proposed model. The thermal conductive PA6 composites are promising to be used as appliance materials.