Microphase-separated structure and mechanical properties of cycloaliphatic diisocyanate-based thiourethane elastomers

Rahmawati Rahmawati, Shuhei Nozaki, Ken Kojio, Atsushi Takahara, Naoki Shinohara, Satoshi Yamasaki

研究成果: ジャーナルへの寄稿記事

抄録

Abstract: Polythiourethane (PTU) and polyurethane (PU) elastomers were prepared from poly(oxytetramethylene) glycol, 1,4-bis(isocyanatomethyl) cyclohexane and a dithiol or diol chain extender with two methylene numbers (tetramethylene (C4) and pentamethylene (C5)). The effect of dithiol and diol and the methylene length of the chain extenders on the microphase-separated structure and mechanical properties of PTU and PU were evaluated. Differential scanning calorimetry (DSC) and wide-angle X-ray diffraction measurements revealed that the degree of ordering of hard segment chains in PTUs is lower than that for PU elastomers. However, it was revealed from the DSC, small-angle X-ray scattering and temperature dependent dynamic viscoelasticity measurements that the degree of microphase separation in the PTUs became stronger than that for the PUs. As a result, the mechanical property of PTUs is comparable with PUs. Furthermore, the glass transition temperature for the soft segment of PTU became lower than that for PU. PTU and PU exhibited a larger degree of microphase separation and mechanical property when the chain extender was composed of a tetramethylene (C4) chain compared to a pentamethylene (C5) chain.

元の言語英語
ページ(範囲)265-273
ページ数9
ジャーナルPolymer Journal
51
発行部数2
DOI
出版物ステータス出版済み - 2 1 2019

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Elastomers
Polyurethanes
Mechanical properties
Microphase separation
Differential scanning calorimetry
Glycols
Viscoelasticity
Cyclohexane
X ray scattering
X ray diffraction

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Materials Chemistry

これを引用

Microphase-separated structure and mechanical properties of cycloaliphatic diisocyanate-based thiourethane elastomers. / Rahmawati, Rahmawati; Nozaki, Shuhei; Kojio, Ken; Takahara, Atsushi; Shinohara, Naoki; Yamasaki, Satoshi.

:: Polymer Journal, 巻 51, 番号 2, 01.02.2019, p. 265-273.

研究成果: ジャーナルへの寄稿記事

Rahmawati, Rahmawati ; Nozaki, Shuhei ; Kojio, Ken ; Takahara, Atsushi ; Shinohara, Naoki ; Yamasaki, Satoshi. / Microphase-separated structure and mechanical properties of cycloaliphatic diisocyanate-based thiourethane elastomers. :: Polymer Journal. 2019 ; 巻 51, 番号 2. pp. 265-273.
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