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研究发现钇盐/线型聚醚基聚氨酯系列反应液的粘度随着稀土盐含量的增多呈规律性上升,认为这与稀土离子同聚氨酯体系中的极性基团产生相互作用有关,由此造成聚合物分子量、分子链排列曲向等结构形态的变化。红外光谱测定证明稀土离子与聚氨酯中的部分羰基配合,产生了新的酰胺结构,其特征吸收谱带位于1 650 cm-1;对该体系的流变行为的研究,进一步证实稀土与聚氨酯间的相互作用的存在。流变学与分子光谱学相结合为高分子溶液结构的研究提供了新的手段。
It was found that the viscosity of yttrium salt / linear polyether-based polyurethane reaction solution increased regularly with the increase of rare earth salt content, which was related to the interaction between rare earth ions and polar groups in polyurethane system Polymer molecular weight, the arrangement of the molecular chain direction and other structural changes. The results of FTIR spectroscopy showed that the rare earth ions and some carbonyls in the polyurethane reacted with each other to produce a new amide structure with a characteristic absorption band at 1 650 cm-1. The rheological behavior of the system was further confirmed by The existence of interaction. Rheology and molecular spectroscopy combined to provide a new means for the study of polymer solution structure.