丙烯腈接枝改性聚氨酯溶液的流变行为
Rheology of Acrylonitrile Grafted Polyurethane
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摘要: 合成了具有不同支链长度和分布的丙烯腈接枝改性聚醚聚氨酯。对其流变行为的研究表明,体系表现出剪切应力变稀的非牛顿性流体特征。丙烯腈支链的和长度、分布状况以及测试温度等都对体系的变性产生影响。流体粘流活化能结果说明,支链亦影响了聚氨酯粘度对温度的依赖性。同时,聚氨酯的聚合反应条件也会改变体系的流变行为。Abstract: The acrylonitrile grafted polyurethane were prepared. The rheological properties of its solutions showed that the systems exhibited the non-Newton liquid . character, and the rheological properties were affected by the acrylonitrile graft chain length and