Simultaneous improvement of interface compatibility and thermal conductivity for thermally conductive ABS/Al2O3 composites by using electron beam radiation processing

Thermally conductive ABS/Al2O3 composites were prepared by direct melt blending, and the effects of electron beam (EB) irradiation on the structure and properties of thermally conductive ABS/Al2O3 composites were studied. The results show that the interface compatibility, tensile strength, flexural strength and thermal conductivity of ABS/Al2O3 composites can be improved simultaneously through the EB radiation processing, because of the formation of radiation induced grafting and stable cross-linked network structure between ABS and Al2O3; The impact strength and thermal stability are severely damaged by EB irradiation, because of the small molecular weight fragments and degradation reactions induced by EB irradiation; When the EB radiation dose is at 30 kGy, the overall performance of the composite material is better: tensile strength 43.5 ± 0.4 MPa, flexural strength 81.5 ± 0.1 MPa, impact strength 11.2 ± 0.1 kJ·m−2, load heat deformation temperature 87.5 ± 0.2 ℃, Thermal conductivity 0.341 ± 0.002 W·(m·K)−1. EB radiation processing is a good and new technology to prepare thermally conductive polymer composites with excellent comprehensive properties, and with a wide range of application.