To investigate the impact factors and action mechanism for the improved thermal oxidative stability of silicone rubber (SR) by incorporating reduced graphene oxide (rGO), graphene oxide (GO), and rGO were prepared, and subsequently graphite, GO and different amounts of rGO were introduced into SR. Transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction were performed to characterize morphology and surface chemical composition of particles (graphite, GO, and rGO). Scanning electron microscope and X-ray diffraction were employed to investigate the dispersion of particles in the SR matrix. Moreover, the effect of morphology and surface chemical composition of particles on the thermal oxidative degradation of SR and the action mechanism were studied via measuring the mechanical properties and the average molecular weight between crosslinking points of the SR before and after aging, as well as utilizing thermogravimetric/infrared spectrometry. The results showed that rGO exhibited the largest exfoliation extent, few oxygen-containing functional groups and better dispersion among these particles, causing the best thermal oxidative stability of rGO/SR nanocomposites, especially when its amount is 1 phr; incorporating rGO could increase the initial formation temperatures of pyrolysis products and decrease the concentrations of products from the oxidation and fracture of side groups of SR. POLYM. COMPOS., 2016. © 2016 Society of Plastics Engineers

中文翻译：

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通过加入还原氧化石墨烯提高硅橡胶的热氧化稳定性：影响因素和作用机制

为了研究通过加入还原氧化石墨烯 (rGO)、氧化石墨烯 (GO) 和 rGO 来提高硅橡胶 (SR) 热氧化稳定性的影响因素和作用机制，然后制备石墨、GO 和不同量的 rGO被引入SR。使用透射电子显微镜、X 射线光电子能谱和 X 射线衍射来表征颗粒（石墨、GO 和 rGO）的形态和表面化学成分。使用扫描电子显微镜和 X 射线衍射来研究颗粒在 SR 基质中的分散情况。而且，通过测定SR老化前后的力学性能和交联点之间的平均分子量，以及利用热重/红外光谱法。结果表明，rGO的剥离程度最大，含氧官能团较少，颗粒间分散性更好，使得rGO/SR纳米复合材料的热氧化稳定性最佳，尤其是当其用量为1 phr时；加入rGO可以提高热解产物的初始形成温度并降低SR侧基氧化和断裂产物的浓度。POLYM。COMPOS., 2016. © 2016 塑料工程师协会 结果表明，rGO的剥离程度最大，含氧官能团较少，颗粒间分散性更好，使得rGO/SR纳米复合材料的热氧化稳定性最佳，尤其是当其用量为1 phr时；加入rGO可以提高热解产物的初始形成温度并降低SR侧基氧化和断裂产物的浓度。POLYM。COMPOS., 2016. © 2016 塑料工程师协会 结果表明，rGO的剥离程度最大，含氧官能团较少，颗粒间分散性更好，使得rGO/SR纳米复合材料的热氧化稳定性最佳，尤其是当其用量为1 phr时；加入 rGO 可以提高热解产物的初始形成温度，并降低 SR 侧基氧化和断裂产物的浓度。POLYM。COMPOS., 2016. © 2016 塑料工程师协会 加入rGO可以提高热解产物的初始形成温度并降低SR侧基氧化和断裂产物的浓度。POLYM。COMPOS., 2016. © 2016 塑料工程师协会 加入rGO可以提高热解产物的初始形成温度并降低SR侧基氧化和断裂产物的浓度。POLYM。COMPOS., 2016. © 2016 塑料工程师协会