Molecular mobility of soft segment of polyurethane elastomers under elongation

Ken Kojio, Makoto Shimada, Suguru Motokucho, Mutsuhisa Furukawa

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

1 被引用数 (Scopus)

抄録

In this study, we investigated molecular mobility of a soft segment in the poly(oxypropylene) glycol (PPG), 4,4′-diphenylmethane diisocyanate (MDI) and 1,4-butane diol (BD)-based polyurethane elastomers (PUE) with and without elongation by dynamic viscoelastic property measurement and pulse nuclear magnetic resonance (NMR) measurement. The peak position of the loss tangent (tand) curves shifted to the lower temperature region with increasing elongation. In the pulse NMR measurement, the long spin-spin relaxation time (T2) component appeared at -18.0(ε=0) and -26.0°C(ε=1. 5), respectively, with increasing temperature. Since this temperature seems to be related to the glass transition temperature (Tg) of the soft segment in the PUE, it is likely to consider that the Tg decreased with increasing strain. These results might be attributed that the size of cooperative motion during the glass transition decrease due to the orientation of the soft segment, and the soft segment phase approach to a pure phase on account of the extraction of the hard segment from the soft segment phase.

本文言語英語
ホスト出版物のタイトルThe XVth International Congress on Rheology - The Society of Rheology 80th Annual Meeting
ページ1345-1347
ページ数3
DOI
出版ステータス出版済み - 2008
外部発表はい
イベント15th International Congress on Rheology - Monterey, CA, 米国
継続期間: 8 3 20088 8 2008

出版物シリーズ

名前AIP Conference Proceedings
1027
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

その他

その他15th International Congress on Rheology
Country米国
CityMonterey, CA
Period8/3/088/8/08

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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