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Chemiluminescence study on the endurance of ethylenevinylacetate (EVA) under radiation and thermal degradation

S. JIPA1, T. ZAHARESCU1,* , R. SETNESCU1,2, W. KAPPEL1

Affiliation

  1. INCDIE ICPE CA, 313 Splaiul Unirii, P. O Box 149, Bucharest 030138, Romania
  2. “Valahia” University, Faculty of Sciences, 18-22 Unirii Bd., Târgovişte, Romania

Abstract

Ethylene vinylacetate copolymer is largely used as electrical insulation material in nuclear applications. Synergistic effects of radiation and heat on the degradation of EVA was investigated. The chemiluminescence procedure at three temperatures exceeding 2000C for kinetic characterization of oxidative degradation was applied. The co-operative factors for radiation and thermal degradation were calculated for polymer samples after energy transfer by irradiation with accelerated electrons and heating. The modifications occurred in the thermal resistance were discussed on the free radical formation. The subsequent thermal treatment will carry on the stimulated oxidation between radical intermediates. The cumulative doses induce fast degradation as the result of high concentration of reactive intermediates..

Keywords

Ethylene-vinylacetate copolymer, Oxidative degradation, Irradiation, Chemiluminescence.

Submitted at: Nov. 14, 2006
Accepted at: June 15, 2007

Citation

S. JIPA, T. ZAHARESCU, R. SETNESCU, W. KAPPEL, Chemiluminescence study on the endurance of ethylenevinylacetate (EVA) under radiation and thermal degradation, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 6, pp. 1623-1625 (2007)