Abstract A hybrid nanocomposite based on ethylene propylene diene monomer/carboxylated styrene-butadiene rubber (EPDM/XSBR) blend with different concentrations (0–7 phr) of multiwall carbon nanotube (MWCNT) was prepared on a two-roll mill. The role of grafted maleic anhydride (EPDM-g-MA) as compatibilizer and the effect of different concentrations of MWCNT on mechanical properties, morphology, rheological and curing characteristics of nanocomposites were investigated. The curing behavior of the prepared nanocomposites was studied using a rheometer. Also, the microstructure of nanocomposites was observed using TEM. By increasing the MWCNT concentration in the compatible blends, the curing time and scorch time of the blends decreased, while the maximum and minimum torque increased. Failure surface morphology studies showed that the existence of EPDM-g-MAH compatibilizer improved the distribution of MWCNT within the polymer matrix and uniform distribution of MWCNT with a small amount of aggregation was obtained. On the other hand, the presence of MWCNT in the matrix led to a sharper surface of the fracture. Also, mechanical properties such as modulus, tensile strength, hardness, fatigue, resilience and elongation-at-break for compatible EPDM/XSBR nanocomposite showed better results than those for incompatible composite. Graphical Abstract

中文翻译：

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乙烯丙烯二烯单体/羧化丁苯橡胶/多壁碳纳米管纳米复合材料的形态、流变和机械性能

摘要 在两辊轧机上制备了一种基于乙烯丙烯二烯单体/羧化丁苯橡胶 (EPDM/XSBR) 与不同浓度 (0-7 phr) 多壁碳纳米管 (MWCNT) 共混物的混合纳米复合材料。研究了接枝马来酸酐 (EPDM-g-MA) 作为增容剂的作用以及不同浓度的多壁碳纳米管对纳米复合材料的机械性能、形貌、流变学和固化特性的影响。使用流变仪研究了制备的纳米复合材料的固化行为。此外，使用 TEM 观察纳米复合材料的微观结构。通过增加相容混合物中 MWCNT 的浓度，混合物的固化时间和焦烧时间减少，而最大和最小扭矩增加。失效表面形态研究表明，EPDM-g-MAH 增容剂的存在改善了 MWCNT 在聚合物基体中的分布，并获得了具有少量聚集的均匀分布的 MWCNT。另一方面，基体中 MWCNT 的存在导致断裂表面更锐利。此外，相容的 EPDM/XSBR 纳米复合材料的机械性能，如模量、拉伸强度、硬度、疲劳、回弹性和断裂伸长率，显示出比不相容复合材料更好的结果。图形概要 相容的 EPDM/XSBR 纳米复合材料的机械性能，如模量、拉伸强度、硬度、疲劳、回弹性和断裂伸长率，显示出比不相容复合材料更好的结果。图形概要 相容的 EPDM/XSBR 纳米复合材料的机械性能，如模量、拉伸强度、硬度、疲劳、回弹性和断裂伸长率，显示出比不相容复合材料更好的结果。图形概要