Radiation Grafting of Polyethylene onto Conductive Carbon Black and Application as a Novel Gas Sensor

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Radiation grafting of polyethylene (PE) onto carbon black was carried out by γ-ray irradiation of PE-adsorbed carbon black. The percentage of PE grafting and decomposition temperature of PE grafted onto the surface were determined by thermogravimetric analysis. At low irradiation temperature, the percentage of grafting was very small in spite of higher irradiation dose. On the contrary, at high temperatures near or above the melting point of PE, the grafting of PE onto the carbon black surface proceeded and the percentage of grafting exceeded 90% when the irradiation dose reached to 200 kGy. The results indicate that the adsorbed PE was completely grafted onto the carbon black surface. The decomposition temperature of the grafted PE on the surface was higher than both free (unadsorbed) PE and adsorbed PE on the carbon black surface, indicating that there is a covalent bond between the carbon black and PE molecule. Using the PE-grafted carbon black and PE, conductive PE/PE-grafted carbon black composite was prepared. Electric resistance suddenly increased in cyclohexane vapor over 10<FONT SIZE="-1"><SUP>4</SUP></FONT> times, and returned to initial resistance when transferred to air, indicating that the composite can be used as a novel gas sensor.

収録刊行物

  • Polymer journal

    Polymer journal 34(1), 30-35, 2002-01-15

    社団法人 高分子学会

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各種コード

  • NII論文ID(NAID)
    10012292326
  • NII書誌ID(NCID)
    AA00777013
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00323896
  • NDL 記事登録ID
    6048613
  • NDL 雑誌分類
    ZP16(科学技術--化学・化学工業--高分子化学・高分子化学工業)
  • NDL 請求記号
    Z53-R487
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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