含有偶氮染料侧基的聚氨酯(脲)的研究

Study of Polyurethanes(ureas) Pendant with Azo-dye

用扩链法合成了一系列含有偶氮染料的侧基聚氨酯和聚脲。ＦＴ－ＩＲ、ＤＳＣ、ＤＭＡ的研究表明，聚合物有良好的力学性能，样品中软硬段的含量决定材料的物理性质。通过ＵＶ的测定，计算出样品均有较高的三阶非线性光学（ＮＬＯ）系数。

Polyurethanes(ureas) pendant with different kinds of azo dye were synthesized by using azo dye diols or diamines as chain extender in a two step block copolymerization reaction. The polymers were characterized by FT IR, DSC, DMA, and UV. The samples exhibited unique mechanical behavior. The different physical properties were strongly related to the contents of soft and hard segment. The higher third order nonlinear optical susceptibility of the samples were calculated from UV.