Synthesis and Properties of Chemically Recyclable Polyurethane Thermoplastic Elastomers Containing Degradable Polyacetal Soft Segments

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  • HASHIMOTO Tamotsu
    Department of Materials Science and Engineering, Graduate School of Engineering, University of Fukui
  • MISAWA Kurayoshi
    Department of Materials Science and Engineering, Graduate School of Engineering, University of Fukui
  • URUSHISAKI Michio
    Department of Materials Science and Engineering, Graduate School of Engineering, University of Fukui

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Other Title
  • 分解性ポリアセタールソフトセグメントを有する熱可塑性ポリウレタンエラストマーの合成と性質
  • ブンカイセイ ポリアセタール ソフト セグメント オ ユウスル ネツ カソセイ ポリウレタン エラストマー ノ ゴウセイ ト セイシツ

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Abstract

Hydroxy-terminated telechelic polyacetals (PHBVE) were synthesized by polyaddition of 4-hydroxybutyl vinyl ether (HBVE; CH2=CH-O-CH2CH2CH2CH2-OH) in the presence of 1,4-butanediol (BD) with an acid catalyst in tetrahydrofuran (THF) at 0°C. Polyurethane elastomers with polyacetal soft segments (PHBVE-PU) were synthesized by the reaction of PHBVE with an excess amount of 4,4′-diphenylmethane diisocyanate and the subsequent chain-extension reaction with BD. PHBVE-PUs exhibited low glass transition temperature, high thermal stability, and good elastomeric properties. The effects of the Mn of polyacetal prepolymer on the thermal and mechanical properties of PHBVE-PUs were investigated. PHBVE-PU underwent smooth degradation with the treatment of aqueous HCl in THF at room temperature to give BD and urethane hard-segment residues as degradation products.<br>

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 65 (2), 178-184, 2008

    The Society of Polymer Science, Japan

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