Radiochemical oxidation of ethylene–propylene elastomers in the presence of some phenolic antioxidants
1999; Elsevier BV; Volume: 63; Issue: 2 Linguagem: Inglês
10.1016/s0141-3910(98)00100-1
ISSN1873-2321
AutoresTraian Zaharescu, Maria Giurginca, S. Jipa,
Tópico(s)Thermal and Kinetic Analysis
ResumoThe oxidative degradation of γ-irradiated ethylene–propylene elastomers (EPR and EPDM) in the presence of some phenolic antioxidants (Topanol OC, Cyanox 2246, Santonox R, Irganox 1010 and Irganox 1076) was studied. The stabilization activity of these antioxidants was related to the gel content of polymer matrix and the G values for radiochemically formed ketones, aldehydes, acids, esters and alcohols. The oxidation rates, obtained by IR measurements of CO concentrations, provide an order of antirad efficiency. Some considerations concerning the influence of the chemical structure of antioxidants on the stabilization of elastomers and a radiochemical oxidation mechanism are presented.
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