熱硬化性ポリウレタンエラストマーおよびポリウレタンフォームにおける動的圧縮弾性率による耐熱性の評価 Evaluation of Thermal Endurance Characteristics of Thermosetting Polyurethane Elastomers and Polyurethane Foams by Dynamic Compression Modulus

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For evaluation of thermal endurance of elastomers and foamed plastics, the time dependences of compression dynamic modulus of thermosetting polyurethane elastomers, and of micro-cell, hard and flexible polyurethane foams were investigated by dynamic viscoelastic measurements. In the temperature range of interest, 140∼290°C, compression dynamic modulus of each elastomer and each foam lessened gradually with time, which is presumably due to thermal degradation of the elastomers and foams. The logarithm of the time t at which the compression dynamic modulus came to be 50% of its value at the beginning of the dynamic measurement was found to be a linear function of reciprocal temperature <i>T</i><sup>-1</sup>. Therefore, thermal endurance characteristics of thermosetting polyurethane elastomers and polyurethane foams can be evaluated as well as closed-celled polyethylene foams from the linear relations between <i>T</i><sup>-1</sup> and the logarithm of time t at which the compression dynamic modulus came to be 50% of its initial value. The loss tangent of elastomer differs from that of foam. Thermal degradation is determined by compression deformation in elastomers that have no cells and by the bending deformation in foam that have closed or open cells.

収録刊行物

  • 高分子論文集  

    高分子論文集 63(9), 645-648, 2006-09-25 

    The Society of Polymer Science, Japan

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各種コード

  • NII論文ID(NAID)
    10018244464
  • NII書誌ID(NCID)
    AN00085011
  • 本文言語コード
    JPN
  • 資料種別
    NOT
  • ISSN
    03862186
  • NDL 記事登録ID
    8518812
  • 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
    Z17-92
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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