Z Soltani - Department of Nuclear Engineering and Physics, Amir Kabir University of Technology, Tehran, Iran
F Ziaie - Agricultural, Medical and Industrial Research School, Nuclear Science & Technology Research Institute, Karaj, Iran
M Ghaffari - Iran Polymer and Petrochemical Institute, Tehran, Iran
H Afarideh - Department of Nuclear Engineering and Physics, Amir Kabir University of Technology, Tehran, Iran

The mechanical properties of composites are strongly dependent on the reinforcement and interfacial compatibility of the composite system [1]. Bioceramics such ashydroxyapatite (HAP) are preferred reinforcements because of their stiffness, density, bioactivity, and biocompatibility [2].Mechanical properties and bioactivity were improved by theaddition of HAP to the polymer matrix. Strong interfacial adhesion between the inorganic fillers and the organicpolymer matrix is a key factor to make the composites have good compatibility [3]. Radiation processing is one of thecertain modern technologies which can be utilized for modification and also sterilization of implants based on sensitive polymers and composites. Irradiation of LDPE/HAPcomposite causes some physicochemical changes occur mainly in LDPE, while HAP remains stable. In this paper,effects of electron beam irradiation on properties of the LDPE/HAP composite containing different w% of HAP were investigated and compared.