Diolefin elastomers easily undergo thermal oxidative aging when exposed to heat and oxygen environment, due to the existence of unsaturated structure. Here we demonstrate a molecular design for improving diolefin elastomer aging resistance by Diels-Alder reaction. The antioxidant effect is attributed to the healing of damaged structure upon thermal oxidative aging, which significantly promotes the mechanical properties of elastomers. The Ashby plot demonstrates that tensile strength and elongation at break of our design elastomers outperform those of elastomers with conventional antioxidant system after thermal oxidative process. Therefore, we believe that structure healing strategy can act as molecular design for improving the aging resistance of diolefin elastomer.

由于存在不饱和结构，二烯烃弹性体在暴露于热和氧气环境中时很容易发生热氧化老化。在这里，我们展示了一种通过Diels-Alder反应提高二烯烃弹性体抗老化性的分子设计。抗氧化作用归因于热氧化老化后受损结构的修复，从而显着提高了弹性体的机械性能。Ashby曲线表明，经过热氧化处理后，我们设计的弹性体的拉伸强度和断裂伸长率优于具有传统抗氧化剂体系的弹性体。因此，我们认为结构修复策略可以作为改善二烯烃弹性体抗老化性能的分子设计。