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

Zohar H. Ophir; Garth L. Wilkes

doi:10.1021/ba-1979-0176.ch003

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

Zohar H. Ophir, Garth L. Wilkes

Research output: Contribution to conference › Paper › peer-review

20 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 language	English (US)
Pages	53-67
Number of pages	15
DOIs	https://doi.org/10.1021/ba-1979-0176.ch003
State	Published - 1979
Externally published	Yes
Event	Multiphase Polym, based on a Symp sponsored by Div of Polym Chem at Am Chem Soc 175th Meet - Anaheim, Calif Duration: Mar 13 1978 → Mar 15 1978

Other

Other	Multiphase Polym, based on a Symp sponsored by Div of Polym Chem at Am Chem Soc 175th Meet
City	Anaheim, Calif
Period	3/13/78 → 3/15/78

All Science Journal Classification (ASJC) codes

General Engineering

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10.1021/ba-1979-0176.ch003

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title = "TIME DEPENDENCE OF MECHANICAL PROPERTIES AND DOMAIN FORMATION OF LINEAR AND CROSSLINKED SEGMENTED POLYURETHANES.",

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.",

author = "Ophir, {Zohar H.} and Wilkes, {Garth L.}",

year = "1979",

doi = "10.1021/ba-1979-0176.ch003",

language = "English (US)",

pages = "53--67",

note = "Multiphase Polym, based on a Symp sponsored by Div of Polym Chem at Am Chem Soc 175th Meet ; Conference date: 13-03-1978 Through 15-03-1978",

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T1 - TIME DEPENDENCE OF MECHANICAL PROPERTIES AND DOMAIN FORMATION OF LINEAR AND CROSSLINKED SEGMENTED POLYURETHANES.

AU - Ophir, Zohar H.

AU - Wilkes, Garth L.

PY - 1979

Y1 - 1979

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0018295880&partnerID=8YFLogxK

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M3 - Paper

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EP - 67

T2 - Multiphase Polym, based on a Symp sponsored by Div of Polym Chem at Am Chem Soc 175th Meet

Y2 - 13 March 1978 through 15 March 1978

ER -

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

Abstract

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