NMR STUDIES ON POLYETHER-POLYURETHANE ZWITTERIONOMERS——CHAIN STRUCTURE AND PHASE SEPARATION

WANG Yuanshen; GUO Mingming

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NMR STUDIES ON POLYETHER-POLYURETHANE ZWITTERIONOMERS——CHAIN STRUCTURE AND PHASE SEPARATION

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- NMR STUDIES ON POLYETHER-POLYURETHANE ZWITTERIONOMERS——CHAIN STRUCTURE AND PHASE SEPARATION
- Vol. 4, Issue 1, Pages: 72-77(1986)
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- Published：20 March 1986
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WANG Yuanshen, GUO Mingming. NMR STUDIES ON POLYETHER-POLYURETHANE ZWITTERIONOMERS——CHAIN STRUCTURE AND PHASE SEPARATION[J]. 1986, 4(1): 72-77.
DOI：

WANG Yuanshen, GUO Mingming. NMR STUDIES ON POLYETHER-POLYURETHANE ZWITTERIONOMERS——CHAIN STRUCTURE AND PHASE SEPARATION[J]. 1986, 4(1): 72-77. DOI：

摘要

The 1H and 13C NMR spectra of polyether-polyurethancs (A) based on 4

4'-diphenylmethanediisocyanate (MDI)

N-methyl diethanolamine (MDEA)

and polytetramethyleneoxide (PTMO)and the zwitterionomers derived from A with various degree of ionization was assigned by comparingwith model compounds. Phase separation of the samples was visualized through pulsed NMR investigations. The FID signals of these multiphase elastomers were recorded and decomposed by non-linear least squaresregression into fast Gaussian and slow exponential components associated with the hard

the soft and the interface respectively.Thus pulsed NMR gives both qualitative and quantitative information about the existence of multiphases and the relative amounts of materials in each phase.

Abstract

The 1H and 13C NMR spectra of polyether-polyurethancs (A) based on 4

4'-diphenylmethanediisocyanate (MDI)

N-methyl diethanolamine (MDEA)

the soft and the interface respectively.Thus pulsed NMR gives both qualitative and quantitative information about the existence of multiphases and the relative amounts of materials in each phase.

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