钇盐/聚氨酯体系流变行为及红外光谱研究  

The Studies on YCl_3/PEU System by Rheology Analysis and FTIR

作　　者：刘智[1] 刘新海[2] 赵莹[2] 孙贤育[1] 翁诗甫[1] 徐端夫[2] 吴瑾光[1] 

机构地区：[1]北京大学化学与分子工程学院稀土材料化学及应用国家重点实验室,北京100871 [2]中国科学院化学研究所高分子物理与化学国家重点实验室,北京100080

出　　处：《光谱学与光谱分析》2005年第11期1782-1785,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(50203001;30371604);教育部博士点基金资助

摘　　要：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。FTIR spectroscopy and rheology analysis were applied to study the YCl3/PEU system. It is apparent that modification with lanthanide complexes such as yttrium leads to a slight increase in viscosity of the polyether urethane solution. The authors conclude that this may be due to the interaction between the lanthanide ions and the polar group in urethane. A new band appears at 1650 cm^-1 in the infrared spectra of the YCl3/PEU system, which corresponds to the new carbonyl structure formed through the coordination with yttrium cations. The dynamic theological behaviors of the solutions demonstrate the interaction furthermore. A higher molecular weight formed with the higher concentration of the lanthanide ions in this DMF solution. And this could be an effective method to characterize the structure of the polymer solutions.

关 键 词：钇盐/聚氨酯 红外光谱法 流变学 变温光谱 

分 类 号：O631.6[理学—高分子化学]