稀土钕与聚氨酯PU相互作用的研究

Study of the interaction between rare earth Nd and polyurethane

以DMF为溶剂,合成不同n(NCO):n(OH)的聚氨酯(PU),将稀土钕盐掺入聚氨酯制得含稀土和高分子的复合材料。采用红外(FT-IR)、紫外—可见(UV-Vis)、差示扫描量热-热重分析(DSC- TGA)、荧光(FS)等手段对聚氨酯和复合材料进行了表征。红外光谱研究结果表明,钕离子与聚氨酯分子发生了作用;荧光光谱表明,复合材料发出钕的特征荧光,这为进一步研究稀土/高分子材料的性能提供了依据。

In the presence of N,N-dimethylformamide solvent,the polyurethanes with different mole ratio of NCO/OH （R） were synthesized. The composites containing rare earth and polymer were also prepared through rare earth Nd compound doping polyurethanes, The polyurethane and composites were characterized by infrared spectrum （FT-IR）, differential scanning calorimeter （DSC）, thermal gravimetric analysis （TGA）,UV-Vis spectroscopy and fluorescence measurement. The results of FTIR showed that there existed interaction between Nd^3＋ and polyurethane. The fluorescence spectrum indicated that the composites emitted the characteristic fluorescence of metal Nd,and this provided the basement for the property study of the rare earth element/polymer materials.