The aim of this dissertation project is to Determine dose of electron beam for recycling of Polytetrafluoroethylene(PTFE) and Comparison of its Physico-Mechanical properties. Physical and mechanical properties; Density, Tensile strength and Elogation at break(%) were studied. Several techniques, Such as Fourier Transform Infrared spectroscopy (FTIR), ThermoGravimetric Analysis(TGA), Differential Scanning Calorimetry(DSC), X-ray Diffraction (XRD) and Electron Spin Resonance spectroscopy(ESR) were applied to characterize the PTFE samples and to study the radiation effects on the crystal structure of the polymer. PTFE was subjected up to 1000 KGy electron beam irradiation in air.The irradiation dose up to 100 KGy showed an increase in the crystallinity degree of PTFE, which has been observed and confirmed during the DSC and XRD measurements. The increase in crystallinity was attributed to the scissions of chain i the amorphous region. Moreever, the number average molecular weights were estimated from the heat of crystallization measured by DSC technique. The results indicated that the molecular weight were decreased by increasing the heat of crystallization due to irradiation. Mechanical Properties of Radiated and non-irradiated PTFE was investigated.