Mechanisms of antioxidant action: Sulphur compounds as inhibitors of mechanochemical degradation of rubber |
| |
Authors: | MSS Coker G Scott HAA Sweis |
| |
Institution: | Department of Chemistry, University of Aston in Birmingham, Gosta Green, Birmingham B4 7ET, Great Britain |
| |
Abstract: | It is shown that the stability of sulphur vulcanised natural rubber to mechanodegradation (fatigue) is associated with the formation of labile oxidation products. The addition of sulphides and their oxidation products to a non-sulphur vulcanisate has a similar effect. Stress relaxation shows that the initial rate of chain scission under stress is directly related to the fatigue resistance of the vulcanisate. However, the oxidation process also produces peroxidolytic antioxidants (PD-C). It is concluded that the fatigue resistance of sulphur vulcanisates is due to a combination of facile restructurisation and an oxidation chain-breaking mechanism. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |