Molecular mobility of soft segment of polyurethane elastomers under elongation

Ken Kojio, Makoto Shimada, Suguru Motokucho, Mutsuhisa Furukawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationThe XVth International Congress on Rheology - The Society of Rheology 80th Annual Meeting
Pages1345-1347
Number of pages3
DOIs
Publication statusPublished - Sep 11 2008
Event15th International Congress on Rheology - Monterey, CA, United States
Duration: Aug 3 2008Aug 8 2008

Publication series

NameAIP Conference Proceedings
Volume1027
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other15th International Congress on Rheology
CountryUnited States
CityMonterey, CA
Period8/3/088/8/08

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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  • Cite this

    Kojio, K., Shimada, M., Motokucho, S., & Furukawa, M. (2008). Molecular mobility of soft segment of polyurethane elastomers under elongation. In The XVth International Congress on Rheology - The Society of Rheology 80th Annual Meeting (pp. 1345-1347). (AIP Conference Proceedings; Vol. 1027). https://doi.org/10.1063/1.2964568