Influence of different types of antioxidants on the aging behavior of carbon-black filled NR and SBR vulcanizates

Background: of this work were results of former investigations of carbon-black filled SBR and NR materials [1]. These results showed clear differences in the degradation behaviour of the used antioxidant during an artificial weathering of the vulcanizates based on SBR and NR. Further, changing material properties were observed with increasing aging time, but this could not be attributed to a decomposition process of the polymer network. For this reason, three different antioxidants IPPD, 6PPD and TMQ were selected for further investigations that are reported in this article. Different tests were performed, starting from vulcameter test over characterization of mechanical properties to viscoelastic properties. It was found that the type of antioxidant influences the material behaviour. But, a uniform grading of the antioxidants is not possible.