My Friend “ELASTOMERS” for 40 years

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Other Title
  • ゴム材料を友とした40年
  • 特論講座 ゴム材料を友とした40年(4)ゴム材料は生き物?
  • トクロン コウザ ゴム ザイリョウ オ トモ ト シタ 40ネン(4)ゴム ザイリョウ ワ イキモノ?
  • （IV）ゴム材料は生き物？
  • Part 4: Is Elastomer a Living Thing?

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Abstract

Stability of network structure was discussed. ESR measurements under the tensile elongation of vulcanizates gave us useful information on the changes of network structure during tensile elongation. ESR spectra showed the appearance of carbon and sulfur radicals which were produced by the breakdown of chemical linkages in the network structure. At a given mechanical energy applied to the vulcanizates, the radical concentration was dependent on the style of network structure and chemical structure of rubber molecules. The difference of binding energy in the network structure was not enough to explain the results. A stress concentration which was induced by the inhomogeneous network structure might have an important role on the partial destruction of network structure in the vulcanizates.

Journal

  • NIPPON GOMU KYOKAISHI

    NIPPON GOMU KYOKAISHI 87 (7), 303-309, 2014

    THE SOCIRETY OF RUBBER SCIENCE AND TECHNOLOGYY, JAPAN

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