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首页> 外文期刊>Journal of Applied Polymer Science >Effects of medium phases on the thermal degradation of hydrogenated nitrile rubber O-rings under compression
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Effects of medium phases on the thermal degradation of hydrogenated nitrile rubber O-rings under compression

机译：中相对压缩下氢化丁腈橡胶O环热降解的影响

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The degradation of hydrogenated nitrile rubber O-rings under exposure to either air or hydraulic oil under compression were investigated at elevated temperatures. The physical and chemical changes of the samples aged for various durations were studied by measuring the weight, compression set, tensile strength, elongation at break, crosslinking density, fracture morphology, and attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy. The results indicate that the weight decreased with exposure time and temperature and that weight loss was greater in oil. Crosslinking and chain scission both occurred during the aging process. The significant changes in the mechanical properties indicate that more severe degradation occurs in air. The fracture morphologies results show that the fracture surfaces aged in oil become rougher and have more defects. The ATR-FTIR results demonstrate that the hydroxyl groups were formed in air and oil, while carboxyl groups were only generated in air. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45864.
机译：下曝光的氢化丁腈橡胶O形环，以在压缩下在空气或液压油的劣化在高温下进行了调查。通过测量体重，压缩形变，拉伸强度，断裂伸长率，交联密度，断口形貌进行了研究老化各种持续时间的样品的物理和化学变化，和衰减全反射 - 傅立叶变换红外光谱（ATR-FTIR）光谱。结果表明，重量与曝光时间和温度，并且重量损失是更大的油减少。交联和断链在老化过程中发生双方。在机械性能显著变化表明在空气中会出现更多的严重退化。在断口形貌结果表明，该断裂表面老化在油变得粗糙，并有更多的缺陷。的ATR-FTIR结果表明，形成了在空气和油的羟基，而羧基在空气中只生成。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018年，135，45864。

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