Dose and Dose-rate Dependence of Polyethylene Irradiation with Electron Beams "in Air."

Torrisi, L.; Visco, A. M.; Campo, N.
February 2007
Journal of Materials Engineering & Performance;Feb2007, Vol. 16 Issue 1, p97
Academic Journal
The chemical and physical properties of ultra-high-molecular-weight-polyethylene (UHMWPE) can be modified by high absorption dose of ionizing radiations. Energetic electron beams, 5 MeV in energy, with a penetration depth higher than 1 cm, can be used to deposit electron energy in thick UHMWPE. Different doses and different dose-rates have been employed at room temperature to irradiate the polyethylene samples in air. Mechanical measurements of tensile strength, wear resistance and hardness were performed on the pristine and electron-irradiated polymers. Results suggested the better irradiation conditions in order to optimize the mechanical properties of the polymer. Special medical applications of the electron-irradiated UHMWPE are presented and discussed.


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