Effect of micro-aggregation structure on rheological properties of thermoplastic polyurethanes

Satoshi Yamasaki, Daisuke Nishiguchi, Ken Kojio, Mutsuhisa Fmukawa

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抜粋

The effect of micro-aggregation structure on the rheological properties of thermoplastic Polyurethane (TPU) was investigated. The TPU samples prepared by injection molding were annealed at various temperatures from 23 to 120°C for 4 h. Differential scanning calorimetry (DSC) and pulsed NMR measurements revealed that the degree of micro-phase separation of the TPUs became stronger with increasing annealing temperature due to the progress of formation of well-organized hard segment domains. The temperature sweep experiments for molten TPUs indicated that the temperature of critical gel point at intersection between G' and G", increased with increasing annealing temperature. In addition, the TPUs showed the strain hardening of uniaxial elongation viscosity with increasing annealing temperature owing to residual hard segment domains at an operating temperature. It was revealed that the formation of well-organized hard segment domains had a profound effect on the rheological properties of TPUs, in particular on their elongational viscosity.

元の言語英語
ホスト出版物のタイトル55th SPSJ Symposium on Macromolecules
ページ3369-3370
ページ数2
55
エディション2
出版物ステータス出版済み - 2006
外部発表Yes
イベント55th Society of Polymer Science Japan Symposium on Macromolecules - Toyama, 日本
継続期間: 9 20 20069 22 2006

その他

その他55th Society of Polymer Science Japan Symposium on Macromolecules
日本
Toyama
期間9/20/069/22/06

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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  • これを引用

    Yamasaki, S., Nishiguchi, D., Kojio, K., & Fmukawa, M. (2006). Effect of micro-aggregation structure on rheological properties of thermoplastic polyurethanes. : 55th SPSJ Symposium on Macromolecules (2 版, 巻 55, pp. 3369-3370)