Rubber materials are utilized in automotive industry as anti-vibration bushes, engine mounts, and shock absorbers especially for the vibration, noise and shock absorbing purposes. General purpose elastomers are blended with each other to combine their individual properties in one material. It is worth mentioning here that with increasing demand in performance requirement, the usage of blends is almost inevitable. In this study, four natural rubber (NR)/styrene butadiene rubber (SBR) blends were formulated with different rubber ratios to produce anti-vibration bushings and to examine the effect of NR/SBR ratio on the performance of bushings. Dispersion of the rubber was also examined to observe the filling distribution of rubber recipes. The prepared rubber formulations were characterized by the rheological and physico-mechanical tests. It was found that the dispersibility and tensile strength of the rubber mixture increased by increasing NR ratio. The rubber formulations were vulcanized at 190 °C and 540–600 s, determined after some rheological and physico-mechanical tests. After vulcanization, static and dynamic mechanical tests on anti-vibration bushings were carried out to examine the effect of elastomer ratio on durability properties of products. We found that increasing NR ratio up to 70% is enough for lowest hysteresis and longer life-time for the anti-vibration products.

Graphical abstract

中文翻译：

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NR/SBR比对减振衬套力学性能和人工力学性能的影响

橡胶材料在汽车工业中用作防振衬套、发动机支架和减震器，特别是用于振动、噪音和减震目的。通用弹性体相互混合，将它们各自的特性结合在一种材料中。这里值得一提的是，随着性能需求的增加，混合的使用几乎是不可避免的。在这项研究中，四种天然橡胶 (NR)/丁苯橡胶 (SBR) 共混物以不同的橡胶比例配制以生产抗振衬套，并检查 NR/SBR 比例对衬套性能的影响。还检查了橡胶的分散性以观察橡胶配方的填充分布。制备的橡胶配方通过流变学和物理力学测试进行表征。发现橡胶混合物的分散性和拉伸强度随着NR比的增加而增加。橡胶配方在 190 °C 和 540–600 s 下硫化，经过一些流变学和物理力学测试后确定。硫化后，对防振衬套进行静态和动态力学测试，以检验弹性体比例对产品耐久性性能的影响。我们发现将 NR 比提高到 70% 就足以使抗振产品具有最低的滞后和更长的使用寿命。对防振衬套进行了静态和动态机械测试，以检查弹性体比率对产品耐久性性能的影响。我们发现将 NR 比提高到 70% 就足以使抗振产品具有最低的滞后和更长的使用寿命。对防振衬套进行了静态和动态机械测试，以检查弹性体比率对产品耐久性性能的影响。我们发现将 NR 比提高到 70% 就足以使抗振产品具有最低的滞后和更长的使用寿命。

图形概要