Blending of rubber is an important route to modify properties of individual elastomeric components in order to obtain optimum chemical, physical, and mechanical properties. In this study, a novel modification of styrene butadiene rubber (SBR) is made by employing acrylic rubber (ACM) to obtain blends of outstanding mechanical, dynamic, and oil resistance properties. In order to achieve those properties, we used a unique vulcanizing system that improves the crosslink density between both polymers and enhances the dynamic mechanical properties as well as its resistance to both motor and break oils. Static mechanical measurements, tensile strength, elongation at break, and hardness are improved together with dynamic mechanical properties investigated using dynamic mechanical analyses. We also proposed a mechanism for the improvement of crosslink density and consequently oil resistance properties. This opens new opportunities for using SBR/ACM blends in oil sealing applications that requires rigorous mechanical and dynamic mechanical properties.

橡胶的共混是改变单个弹性体组分性能以获得最佳化学、物理和机械性能的重要途径。在这项研究中，通过使用丙烯酸橡胶 (ACM) 对丁苯橡胶 (SBR) 进行了新型改性，以获得具有出色机械、动态和耐油性能的共混物。为了实现这些性能，我们使用了一种独特的硫化系统，该系统提高了两种聚合物之间的交联密度，并增强了动态机械性能以及对发动机油和断裂油的耐受性。静态机械测量、拉伸强度、断裂伸长率和硬度与使用动态机械分析研究的动态机械性能一起得到改进。我们还提出了一种提高交联密度和耐油性能的机制。这为在需要严格机械和动态机械性能的油封应用中使用 SBR/ACM 混合物开辟了新的机会。