Abstract
The stabilization of ethylene-propylene diene rubber (EPDM) with naringenin and caffeic acid is studied. The selected concentrations were 0.25, 0.50 and 1phr. The degradation was performed by γ–irradiation. The protective effect of these antioxidants was investigated by isothermal chemiluminescence at 170°C and FTIR spectroscopy. The synergetic action of these compounds and metallic selenium was also revealed. The exceptional contribution provided by these phenolic stabilizers is characterized by three kinetic parameters: initial CL intensity, oxidation induction time and maximum period of degradation. The radiation stability of stabilized EPDM is efficiently depicted by induction periods which are the minimum 6times longer for unirradiated samples and 2–50 times longer for 50kGy-irradiated specimens than pristineEPDM.
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