Characteristics of Vulcanized EPDM Degradation in Ozone Water or Ozone/Chlorine Water

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  • オゾン水及びオゾン/塩素共存水によるEPDMの劣化
  • オゾンスイ オヨビ オゾン エンソ キョウソンスイ ニ ヨル EPDM ノ レッカ

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The degradation behavior of vulcanized EPDM in ozone water (O3(aq)) or ozone/chlorine water (O3/Cl2(aq)) was investigated and characterized by ATR-FT-IR, GPC, and EPMA analysis.<br>The superficial layer of vulcanized EPDM was observed to be disrupted due to oxidative shortening of EPDM polymer chains by O3(aq) or O3/Cl2(aq) Furthermore, EPDM treated in O3/Cl2(aq) contained a higher proportion of decomposition products than that treated in O3/Cl2(aq). This may be a result of the synergetic effect on acceleration of oxidation by chlorine and reaction with radical oxygen generated from O3/Cl2(aq).<br>As an additional experiment, degradation behavior of carbon black- and silica-compounded EPDM's in O3/Cl2(aq) was investigated. In this case, the latter material was less damaged by oxidation than the former one.

Journal

  • NIPPON GOMU KYOKAISHI

    NIPPON GOMU KYOKAISHI 81 (1), 14-18, 2008

    THE SOCIRETY OF RUBBER SCIENCE AND TECHNOLOGYY, JAPAN

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