Abstract Natural rubber (NR) vulcanizates reinforced by carbon nanotubes (CNT, 3 phr), graphite particles (GP) and CNT/GP hybrid filler (varied GP 0–50 phr) were prepared. The stress relaxation behaviors of various filled samples were characterized by the novel temperature scanning stress relaxation (TSSR) technique to elucidate the state and degree of filler dispersion based on initial relaxation modulus, bound rubber, and thermal stability. The incorporation of CNT/GP hybrid filler in NR matrix improved relaxation modulus, bound rubber, and thermal stability of the nanocomposites. The CNT particles in the hybrid composites prevented the re-agglomeration of dispersed GP after mixing by a thermodynamic effect. It was found that a combination of 3 phr CNT and 30 phr GP gave superior properties to NR vulcanizates. That is, good dispersion and distribution of CNT and GP in the NR matrix provided further significant improvements in electrical conductivity and dielectric constant of the nanocomposites. The NR nanocomposites with high conductivity and low dielectric constant seems to be a semi-conductive substrate to be used in many electrical devices.

中文翻译：

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碳纳米管和石墨杂化填料对天然橡胶纳米复合材料性能的影响

摘要 制备了由碳纳米管 (CNT, 3 phr)、石墨颗粒 (GP) 和 CNT/GP 混合填料（不同 GP 0-50 phr）增强的天然橡胶 (NR) 硫化胶。各种填充样品的应力松弛行为通过新型温度扫描应力松弛 (TSSR) 技术进行表征，以基于初始松弛模量、结合橡胶和热稳定性阐明填料分散的状态和程度。在 NR 基体中加入 CNT/GP 杂化填料提高了纳米复合材料的松弛模量、结合橡胶和热稳定性。混合复合材料中的 CNT 颗粒通过热力学效应阻止了分散的 GP 在混合后的重新聚集。发现 3 份 CNT 和 30 份 GP 的组合赋予 NR 硫化胶优异的性能。那是，碳纳米管和 GP 在 NR 基体中的良好分散和分布进一步显着提高了纳米复合材料的电导率和介电常数。具有高电导率和低介电常数的 NR 纳米复合材料似乎是用于许多电子设备的半导体基材。