Abstract Cerium oxide/silicon rubber was prepared via mechanical blending. Mechanical and frictional properties, as well as thermal stability after thermo-oxidative ageing were investigated in this rubber composite. 3D surface profilometry, scanning electron microscopy (SEM) and thermogravimetry analysis (TGA) were used to study the friction surface characteristics, friction mechanism and thermal stability, respectively. Additionally, swelling experiments were carried out to investigate the variation of crosslinking density. After thermo-oxidative ageing, the tear strength of cerium oxide/silicon rubber decreases. However, in the early ageing stage, improvements in tensile strength, elongation at break, and frictional performance are caused by crosslinking density increments. Moreover, the addition of cerium oxide remarkably improves the re-crosslinking degree during ageing process, which in turn decreases the number of holes on the friction surface and endows the silicon rubber with better mechanical and frictional properties, as well as thermo-oxidative ageing resistance.

中文翻译：

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氧化铈/硅橡胶的热氧化老化行为

摘要 采用机械共混法制备了氧化铈/硅橡胶。在这种橡胶复合材料中研究了机械和摩擦性能，以及热氧化老化后的热稳定性。3D表面轮廓仪、扫描电子显微镜（SEM）和热重分析（TGA）分别用于研究摩擦表面特性、摩擦机理和热稳定性。此外，还进行了溶胀实验以研究交联密度的变化。热氧化老化后，氧化铈/硅橡胶的撕裂强度降低。然而，在早期老化阶段，拉伸强度、断裂伸长率和摩擦性能的改善是由交联密度增加引起的。而且，