In this work, polymethyl methacrylate (PMMA) and polystyrene (PS) with controlled structures would be grafted on graphene material. The hybrid materials were prepared by coating graphene oxide (GO) with polydopamine (PDA) as a reactive underlayer and reducing agent, subsequently, surface-initiated polymerization of monomers (methyl methacrylate, styrene) based on the activators regenerated electron transfer atom transfer radical polymerization (ARGET-ATRP) technique. The polymer brush-modified graphene materials were then incorporated into the PMMA or PS matrix to get polymer nanocomposites with better thermal properties. The results of Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and thermal gravimetric analysis (TGA) demonstrated that PMMA and PS chains were successfully anchored on the surfaces of functionalized GO sheets. The influence of the grafted polymer brush-modified GO on thermal stability of PMMA and PS was investigated by a simultaneous thermal analyzer. Thermal conductivity of the polymer nanocomposite was determined by a conductive calorimeter. The results showed that thermal stability, glass transition temperature (), and thermal conductivity of the polymer nanocomposites were obviously improved compared with pure PMMA or PS.

中文翻译：

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用聚合物刷对氧化石墨烯进行表面官能化以改善聚合物基体的热性能

在这项工作中，具有受控结构的聚甲基丙烯酸甲酯（PMMA）和聚苯乙烯（PS）将被接枝在石墨烯材料上。通过用聚多巴胺（PDA）作为反应性底层和还原剂涂覆氧化石墨烯（GO），然后基于活化剂的单体（甲基丙烯酸甲酯，苯乙烯）的表面引发聚合反应，制备再生材料，再生成电子转移原子转移自由基聚合反应。 （ARGET-ATRP）技术。然后将聚合物刷改性的石墨烯材料掺入PMMA或PS基质中，以获得具有更好热性能的聚合物纳米复合材料。傅里叶变换红外光谱（FTIR），X射线光电子能谱（XPS），扫描电子显微镜（SEM），透射电子显微镜（TEM）的结果 热重分析（TGA）表明，PMMA和PS链已成功锚固在功能化GO片材的表面上。用同时热分析仪研究了接枝聚合物刷改性GO对PMMA和PS热稳定性的影响。聚合物纳米复合材料的热导率通过导电量热计确定。结果表明，热稳定性，玻璃化转变温度（），与纯PMMA或PS相比，该聚合物纳米复合材料的导热率明显提高。