TIME DEPENDENCE OF MECHANICAL PROPERTIES AND DOMAIN FORMATION OF LINEAR AND CROSSLINKED SEGMENTED POLYURETHANES.

Zohar H. Ophir, Garth L. Wilkes

Research output: Contribution to conferencePaperpeer-review

19 Scopus citations

Abstract

In the reported experiments, a systematic series of segmented polyester-MDI polyurethanes were investigated by SAXS, DSC and stress strain measurements. The linear polymer as well as three peroxide cured samples of different crosslinking levels were utilized. Correlations were made between time-dependent changes in structure and mechanical properties following specific thermal treatments. Higher crosslinking leads to lower final domain formation and to lower modulus. Also, the cross-linked samples had their domain texture more easily disrupted at lower temperature than did the linear system. Finally, the rate of phase separation upon cooling was increased as the degree of crosslinking was decreased.

Original languageEnglish (US)
Pages53-67
Number of pages15
DOIs
StatePublished - 1979
Externally publishedYes
EventMultiphase Polym, based on a Symp sponsored by Div of Polym Chem at Am Chem Soc 175th Meet - Anaheim, Calif
Duration: Mar 13 1978Mar 15 1978

Other

OtherMultiphase Polym, based on a Symp sponsored by Div of Polym Chem at Am Chem Soc 175th Meet
CityAnaheim, Calif
Period3/13/783/15/78

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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