Thermal oxidative aging and other chemical‐induced degradation greatly affect the service life of elastomer components. In this article, we presented a strategy to predict the long‐term mechanical behavior of elastomeric components, to foresee the failure of elastomer components in design stage. The accumulation and consumption of small molecule reactants in elastomers are described using a diffusion–reaction process. Free‐volume theory is applied to consider the diffusivity change during this process. Degradation of elastomers under elevated temperature up to 500 K, environmental pressure up to 4 atm, and different cross‐link densities are studied in this simulation. Methodology of prediction of mechanical behavior is proposed based on the affined network model.

中文翻译：

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基于扩散反应过程的弹性体降解和力学行为的定量预测

热氧化老化和其他化学诱导的降解极大地影响弹性体组件的使用寿命。在本文中，我们提出了一种策略，可预测弹性体组件的长期机械性能，以预见弹性体组件在设计阶段的故障。使用扩散反应过程描述了弹性体中小分子反应物的积累和消耗。应用自由体积理论来考虑此过程中的扩散率变化。在此模拟中研究了在高达500 K的高温，高达4 atm的环境压力和不同的交联密度下弹性体的降解。提出了基于亲和网络模型的力学行为预测方法。