Determination of Elastic Modulus of Spider's Silks

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Elastic moduli were determined from the stress–strain curves of draglines secreted from <I>Nephila clavata</I> spiders (Japanese golden-web spiders) collected at different stages of growth. In order to accurately determine the elastic modulus it was necessary to measure the cross sectional area of the same dragline consisting of double filaments used for measuring the stress–strain curves. The elastic modulus was determined to be <I>ca.</I> 10 GPa for spiders weighing less than 50 mg, <I>ca.</I> 13 GPa for spiders weighing between 50 and 800 mg, and <I>ca.</I> 10 GPa for old spiders weighing more than 800 mg. The relatively small values of <I>ca.</I> 10 GPa for the elastic modulus may come from the relatively large cross sectional area of the draglines for spiders weighing less than 50 mg and from the small value of the elastic limit strength for spiders weighing more than 800 mg. It was found that the elastic modulus of spider's draglines consisting of almost amorphous protein molecules was relatively large in comparison with the elastic modulus of several GPa obtained for amorphous synthetic polymers.

収録刊行物

  • Polymer journal

    Polymer journal 34(1), 25-29, 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)
    10012292307
  • 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
    6048608
  • 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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