THE COVULCANIZATION OF EPDM WITH NR AND ITS EFFECT ON THE FATIGUE PROPERTIES

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  • EPDM/NRブレンド系の共加硫性とその動的疲労への影響について
  • EPDM NR ブレンドケイ ノ キョウカリュウセイ ト ソノ ドウテキ ヒロ

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In our previous paper, it was reported that the covulcanization of EPDM with NR was much improved by addition reaction of sulfur compounds to EPDM under heating before blending it with NR. In this paper, the covulcanization was discussed by measuring hysteresis loss, strain energy and constant stress fatigue life. Practical application to the side-wall of bicycle tire was evaluated.<BR>It was found that vulcanizate of P-EPDM (EPDM with pendent sulfur) with NR showed good covulcanization behavior. But the blend of EPDM with NR did not covulcanize satisfactorily and EPDM portion worked as flaws in constant stress fatigue life test. Mechanical crack was observed on the tire of EPDM-NR blend in the early stage of field test, but no crack on one of P-EPDM-NR blend even after 2-year field test.

Journal

  • NIPPON GOMU KYOKAISHI

    NIPPON GOMU KYOKAISHI 49 (3), 246-250, 1976

    THE SOCIRETY OF RUBBER SCIENCE AND TECHNOLOGYY, JAPAN

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