Four hard segment model compounds were prepared from Urea and 4 , 4? ? diphenylmenthane diisocyanante ( MDI ) .

以尿素为 扩链 剂,合成了一系列聚氨酯脲热塑性弹性体及其硬段模型化合物.

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The results indicated that cross - link is helpful to increasing the stability of hard - segment.

表明交联有利于提高硬段微区的稳定性.

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Tg of the hard - segment enhances with increasing hard - segment content and forming much H - bonds.

随着硬段含量的提高以及氢键的形成,硬段的玻璃化温度是逐步升高的.

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