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The assessment of thermal and radiation stability of UHMWPE

MIHAI ADRIAN1, T. ZAHARESCU1,* , S. JIPA1,2, L. ANDRADE E SILVA3, C. OROS2

Affiliation

  1. INCDIE ICPE CA, 313 Splaiul Unirii 313, Bucharest 030138, Romania
  2. ”Valachia” University of Targoviste, Bd. Unirii 18, Romania
  3. IPEN, Radiation Technology Centre, São Paol, Brasil

Abstract

Preirradiated ultrahigh molecular weight polyethylene (UHMWPE) was subjected to other cycle of γ-exposure in order to explain the behavior of this material after radiation processing. The oxygen uptake investigation was selected for the characterization of thermal stability of multisession irradiation. The long life radicals promote crosslinking or oxidative degradation depending on the second irradiation dose and on the environmental conditions. The main kinetic parameters: oxidation period and oxidation rate were evaluated depicting the availability of radiochemical processing of UHMWPE for further long term applications. Irradiation of UHMWPE in salt solution reveals the improvement in the thermal strength for low exposure doses..

Keywords

UHMWPE, Irradiation, Thermal resistance, Oxygen uptake.

Submitted at: Feb. 25, 2008
Accepted at: April 4, 2008

Citation

MIHAI ADRIAN, T. ZAHARESCU, S. JIPA, L. ANDRADE E SILVA, C. OROS, The assessment of thermal and radiation stability of UHMWPE, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 4, pp. 826-829 (2008)