水道水残留塩素に侵されるEPDMパッキンの劣化メカニズム The Degradation Mechanism of EPDM Packing by Chlorine in City Water

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In order to elucidate the degradation mechanism of EPDM rubber caused by a amount of chlorine in city water, EPDM rubbers containing 2 kinds of carbon black (ie. HAF and FT) were employed and corroded in chlorine water, Their morphology changes before and after degradation were observed by SEM. The effect of the amount of moisture Was examined by EPMA. The degradation mechanism was studied by XPS and <sup>13</sup>C-NMR. The EPDM rubber loaded HAF was easier to absorb chlorine and to be deteriorated than the one loaded FT. As a result of XPS measurement, Cl (2p) peak was detected from the sample after degradation treatment. <sup>13</sup>C-NMR measurement revealed that the methyl group of diene side chain of EPDM rubber was changed into the chlorinated methyl group. It was thought that as the chlorinated methyl group reacted with the other molecular chains of EPDM rubber, the crosslinking density increased. Therefore, the degraded EPDM rubber was brittle, collapsed and fell off.

収録刊行物

  • 日本ゴム協會誌

    日本ゴム協會誌 75(7), 313-317, 2002-07-15

    THE SOCIRETY OF RUBBER SCIENCE AND TECHNOLOGYY, JAPAN

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各種コード

  • NII論文ID(NAID)
    10008834827
  • NII書誌ID(NCID)
    AN00189720
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    0029022X
  • NDL 記事登録ID
    6218094
  • NDL 雑誌分類
    ZP17(科学技術--化学・化学工業--高分子化学・高分子化学工業--ゴム・プラスチックス)
  • NDL 請求記号
    Z17-125
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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