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首页> 外文期刊>Journal of Applied Polymer Science >Mechanical aging behavior of styrene-butadiene rubbers evaluated by abrasion test
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Mechanical aging behavior of styrene-butadiene rubbers evaluated by abrasion test

机译：通过磨耗试验评估丁苯橡胶的机械老化性能

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摘要

The ring-shaped styrene-butadiene rubbers (SBRs) test pieces ran on a rotating stainless-steel ring using an abrasion tester to evaluate the changes in the mechanical properties, such as the tensile storage modulus and tan δ values, the modulus at 300% elongation, and the strength and extension ratio at the breaking point, after a mechanical aging process. The surface of the SBR test pieces and the formed rubber debris after the running experiment was investigated using scanning electron microscopy. A change in the crosslinking density of the SBRs and the analysis of the isolated free polymers showed the occurrence of bond scission of the copolymer chains. On the other hand, the mechanical properties of whole SBR samples showed only a small change during the mechanical aging test.
机译：环形丁苯橡胶（SBR）测试件使用磨损测试仪在旋转的不锈钢环上运行，以评估机械性能的变化，例如拉伸储能模量和tanδ值（300％时的模量）机械老化过程后的伸长率以及断裂点的强度和延伸率。使用扫描电子显微镜研究运行实验后的SBR试件的表面和形成的橡胶碎片。 SBR的交联密度的变化和对分离的游离聚合物的分析表明发生了共聚物链的键断裂。另一方面，整个SBR样品的机械性能在机械老化测试过程中仅显示出很小的变化。

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