The thermal conductivity of pure ABS polymer and ABS polymer composite with 0.5 wt% of the thermally reduced graphene oxide (trGO) was measured in a wide temperature range from 2 to 100 . Adding 0.5 % trGO enhanced the thermal conductivity of ABS polymer by 1.5 times over the entire temperature range. A comparison of the thermal conductivity of ABS and epoxy-resin amorphous polymers and structural glasses shows that it is closely related to the concept of minimal thermal conductivity, which is determined by the intrinsic phonon scattering and the coherence contribution to the thermal conductivity in the material. The temperature dependence of the coherence contribution to the thermal conductivity, related to wave-like tunneling and loss of coherence between different vibrational eigenstates, was approximated by the exponential function of an Arrhenius type with characteristic energy and a pre-exponential coefficient . A proportional correlation was found between the low-temperature anomaly of the heat capacity, named the calorimetric Boson peak, and the high-temperature behavior of thermal conductivity of amorphous polymers and structural glasses. Thus, this study provides new physical information about the thermal conductivity in disordered materials and indicates a universality of its temperature dependence.

中文翻译：

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用氧化石墨烯增强 ABS 聚合物的热传输：深入了解低温导热行为以及与玻色子峰异常的相关性

在 2 至 100 的宽温度范围内测量了纯 ABS 聚合物和含有 0.5 wt% 热还原氧化石墨烯 (trGO) 的 ABS 聚合物复合材料的导热率。添加 0.5% trGO 使 ABS 聚合物在整个温度范围内的导热率提高了 1.5 倍。ABS与环氧树脂非晶聚合物和结构玻璃的导热系数的比较表明，它与最小导热系数的概念密切相关，最小导热系数是由材料中固有的声子散射和相干性对导热系数的贡献决定的。相干性对热导率贡献的温度依赖性，与波状隧道效应和不同振动本征态之间的相干性损失相关，通过具有特征能量和指前系数 的阿累尼乌斯型指数函数来近似。研究人员发现，非晶态聚合物和结构玻璃的低温热容异常（称为量热玻色子峰）与高温热导率行为之间存在比例相关性。因此，这项研究提供了有关无序材料热导率的新物理信息，并表明其温度依赖性的普遍性。