Add time:09/10/2019 Source:sciencedirect.com
This work studied possibilities of using lanthanum stearate (LaSt) as an antioxidant in epoxidized natural rubber containing 25 mol.% expoxidation (ENR25) compounds. For comparison purposes, two commercial antioxidant 4010NA and MB were also used. The influence of LaSt, antioxidant 4010NA and MB on cure characteristics, mechanical properties, crosslink density, hot air aging and thermo-oxidative degradation were studied. The results indicated that the incorporation of LaSt and antioxidants could accelerate the vulcanization of ENR. The ENR vulcanizates with antioxidant MB had better mechanical properties than 4010NA and LaSt. Compared with antioxidant 4010NA and MB, the ENR25 vulcanizates with the addition of LaSt exhibited the best hot air aging resistance and thermo-oxidative stability.
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