| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5203939 | Polymer Degradation and Stability | 2009 | 6 Pages |
Abstract
In the present work, medical grade UHMWPE was blended with 1.1, 2.3 and 11Â mmol/l of vitamin E and consolidated by compression moulding. Small blocks of reference and of vitamin E-blended UHMWPE were then electron-beam irradiated at 30, 60 and 90Â kGy, both in vacuum and in air. FTIR spectroscopy was used to monitor changes in both the polymer and the additive. Thin sections of irradiated virgin and vitamin E-blended UHMWPE were aged in air, at room temperature and in the dark and the kinetics of oxidation followed by FTIR. The reaction between vitamin E and macro-alkyl radicals or unlikely with peroxy radicals has been demonstrated and a correlation between the decrease of macroradicals and the stabilization effect of vitamin E has been shown.
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Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
L. Costa, I. Carpentieri, P. Bracco,