Infrared spectroscopy analysis of physico-chemical modifications induced by heavy ions in ultra high molecular weight polyethylene

V.C. CHAPPA; M.F. DEL GROSSO; G. GARCÍA BERMÚDEZ; R.O. MAZZEI

NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH B - BEAM INTERACTIONS WITH MATERIALS AND ATOMS

Elsevier

Lugar: Amsterdam; Año: 2006 vol. 243 p. 58 - 62

0168-583X

Structural analysis with infrared spectroscopy was carried out on ultra-high molecular weight polyethylene (UHMWPE). The polyethylene was irradiated using Li, C, N, S and I heavy ion beams with different fluences. The analysis showed that the absorbance of the C@C stretching vibration from trans-vinylene groups containing hydroperoxides presents a maximum at certain ion fluence and is correlated with the ion stopping power. The results were analyzed by a Monte Carlo simulation program that models the irradiation process from a geometrical point of view, in which the latent tracks consist in a central core zone surrounded by a larger perturbed region. This study suggests that it is possible to estimate the core dimension from absorbance measurements as a function of fluence. A possible relationship between this C=C structure with the cross-link of two polymeric chains is discussed.@C stretching vibration from trans-vinylene groups containing hydroperoxides presents a maximum at certain ion fluence and is correlated with the ion stopping power. The results were analyzed by a Monte Carlo simulation program that models the irradiation process from a geometrical point of view, in which the latent tracks consist in a central core zone surrounded by a larger perturbed region. This study suggests that it is possible to estimate the core dimension from absorbance measurements as a function of fluence. A possible relationship between this C=C structure with the cross-link of two polymeric chains is discussed.C structure with the cross-link of two polymeric chains is discussed.