液化木材を基材としたポリウレタンの物性に及ぼすハードセグメント濃度の影響 Effects of Hard Segment Content on the Properties of Liquefied Wood based Polyurethanes

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著者

    • 市瀬 英明 ICHISE Hideaki
    • 長崎大学大学院生産科学研究科物質科学専攻 Department of Materials Science, Graduate School of Science and Technology, Nagasaki University
    • 古川 睦久 FURUKAWA Mutsuhisa
    • 長崎大学大学院生産科学研究科物質科学専攻 Department of Materials Science, Graduate School of Science and Technology, Nagasaki University

抄録

Effects of hard segment content on the mechanical and thermal properties of liquefied wood (LW) based polyurethanes (PUs) were studied. LW was prepared from Hinoki cypress (<i>Chamaecyparis obtusa</i>) wood meal using poly (oxyethylene) glycol as a liquefaction solvent. PUs with various hard segment content were prepared from LW as a polyol, polymeric diphenyl methane diisocyanate (pMDI) or hexamethylene diisocyanate (HDI) and 1, 4-butanediol using a one-shot method in bulk state. Gel fraction of pMDI based PUs exceeded over 94%, while that of HDI based PUs was about 43-46%. Glass transition temperature (<i>T</i><sub>g</sub>) and peak temperature of loss tangent (<i>T</i><sub>α</sub>) of pMDI based PUs drastically increased with increasing hard segment content. However, <i>T</i><sub>g</sub> and <i>T</i><sub>α</sub> of HDI based PUs increased slightly. These results suggest that pMDI based PUs had microphase mixing, but HDI based PUs had microphase separation. The degradation initiation temperature (<i>T</i><sub>s</sub>) of HDI based PUs increased with increasing hard segment content. However, there was no clear relation between <i>T</i><sub>s</sub> of pMDI based PUs and hard segment content. Tensile strength and Young's modulus of PUs increased with increasing hard segment content, respectively. Elongation at break of PUs decreased with increasing hard segment content.

収録刊行物

  • 日本ゴム協會誌  

    日本ゴム協會誌 81(8), 339-345, 2008-08-15 

    THE SOCIRETY OF RUBBER SCIENCE AND TECHNOLOGYY, JAPAN

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各種コード

  • NII論文ID(NAID)
    10021368013
  • 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
    9619121
  • 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  NDL  J-STAGE 
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