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The photo-oxidation of EPDM rubber: Part III—Mechanistic aspects and stabilization |
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| Authors: | Eliana A Rezende Duek Marco-A De Paoli |
| Institution: | Instituto de Química, Universidade Estadual de Campinas, C. Postal 6154, 13.081-, Campinas, SP-, Brazil |
| Abstract: | The kinetics of the photo-oxidation of crude EPDM rubber has been studied in order to propose a mechanism for the sequence of reactions which occurs during the photo-degradation process. The presence of the unsaturation markedly affects the kinetics of the photo-oxidation of EPDM in comparison with that of EPM. We have also studied the stabilization effect of a hindered amine and a hindered phenol on EPDM and compared this with crude EPM rubber. These stabilizers showed poor efficiency, which is explained by the presence of impurities which act as sensitizers for the degradation of the crude rubber. |
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