Recent progress of anti-radiation aging additives for rubber
Rubber is commonly used as a sealing and damping material in fields such as aerospace and nuclear power plants.These rubber-containing structures are inevitably affected by the irradiation en-vironment,which can induce rubber crosslinking and decomposition,leading to a decrease in material performance and posing a threat to personnel and equipment safety.Therefore,improving the anti-aging ability and extending the service life of rubber have become important indicators for engineering needs.An effective way to delay rubber degradation is to block free radical chain reaction during the aging process by adding antioxidants in the material.However,traditional small molecule antioxidants may migrate to the surface of composite materials and are rapidly consumed during irradiation aging,which will reduce the long-term anti-aging efficiency.Herein,low toxicity,anti-migration,low-cost,and high-performance antioxidants have received increasing attention.Therefore,the recent progress of antioxidants for rubber was systematically reviewed.Firstly,the mechanism of protection of an-tioxidants was briefly introduced.Then,the strategies to improve the lasting effect of antioxidants were summarized.Finally,the challenges and the development trend of antioxidants were prospected.
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