A thermoplastic elastomer (TPE) based nanocomposite with the same weight ratio of hybrid nanofillers composed of carbon nanotubes (CNTs) and montmorillonite nanoclay (DK4) was prepared using a melt blending technique with an internal mixer. The TPE composite was blended from polylactic acid (PLA), liquid natural rubber (LNR) as a compatibilizer and natural rubber (NR) in a volume ratio of 70:10:20, respectively. The weight ratio of CNTs and DK4 was 2.5 wt.%. The prepared samples were exposed to gamma radiation at range of 0–250 kGy. After exposure to gamma radiation, the mechanical, thermo-mechanical, thermal and electrical conductivity properties of the composites were significantly higher than unirradiated TPE composites as the irradiation doses increased up to 150 kGy. Transmission electron microscopy (TEM) micrographs revealed the good distribution and interaction between the nano-fillers and the matrix in the prepared TPE hybrid nanocomposites. In summary, the findings from this work definite that gamma irradiation might be a viable treatment to improve the properties of TPE nanocomposite for electronic packaging applications.

中文翻译：

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伽马辐射对混合碳纳米管/蒙脱石纳米复合材料的力学、热学和导电性能的影响

使用具有密炼机的熔融共混技术制备具有相同重量比的由碳纳米管 (CNT) 和蒙脱石纳米粘土 (DK4) 组成的混合纳米填料的热塑性弹性体 (TPE) 纳米复合材料。TPE 复合材料由聚乳酸 (PLA)、作为增容剂的液态天然橡胶 (LNR) 和天然橡胶 (NR) 分别按 70:10:20 的体积比混合而成。CNTs和DK4的重量比为2.5wt.%。制备的样品暴露于 0-250 kGy 范围内的伽马辐射。暴露于伽马辐射后，随着辐照剂量增加到 150 kGy，复合材料的机械、热机械、导热和导电性能显着高于未辐照的 TPE 复合材料。透射电子显微镜 (TEM) 显微照片揭示了制备的 TPE 混合纳米复合材料中纳米填料与基质之间的良好分布和相互作用。总之，这项工作的发现确定了伽马辐射可能是一种可行的处理方法，可以改善用于电子封装应用的 TPE 纳米复合材料的性能。