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CHEN Qun, WANG Yuanshen, YU Xuehai, WU Xuewen. A SOLID NMR STUDY OF POLYETHERESTER-UREAS[J]. Chinese Journal of Polymer Science,
;1992, 10(4): 287-293.
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The morphology of some polyetherester-ureas were studied by 13C CP/MAS and 1H wide-line NMR spectroscopy. It was found that the HDI and MDI based polymers have well crystallized hard segments, whereas the TDI and HMDI based ones have not. For HDI/MDI based polymers, the presented results suggest that the distribution of two kinds of hard segment units is mainly in a block form. The influences of the different hard segment and chain length on the mobility of the soft segment were also studied.
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