Mechanical aging behavior of styrene-butadiene rubbers evaluated by abrasion test

Authors

  • Takeo Nakazono,

    Corresponding author
    1. Sumitomo Rubber Industry, Ltd. (SRI), Tsutsui-cho, Chuo-ku, Kobe 651-0071, Japan
    2. Department of Applied Chemistry and Bioengineering, Graduate School of Engineering, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
    • Sumitomo Rubber Industry, Ltd. (SRI), Tsutsui-cho, Chuo-ku, Kobe 651-0071, Japan
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  • Akikazu Matsumoto

    1. Department of Applied Chemistry and Bioengineering, Graduate School of Engineering, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
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Abstract

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. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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