以对硝基苯胺、亚硝酸钠和S（-）-a-甲基苄胺等为原料，通过重氮、偶合反应制备了新型含手性碳原子偶氮聚氨酯材料，利用紫外一可见光谱（UV—Vis）对该材料进行了吸收谱表征。测定了材料在不同溶剂中的溶解性；同时测定材料的熔点，其值为165℃，结果表明该材料具有较高的热稳定性；研究了手性碳原子偶氮聚氨酯膜材料的机械性能（如抗拉强度、硬度等），采用衰减全反射法（ATR）测得不同温度、不同波长及不同模式（TE，TM）下的折射率和不同模式下的热光系数，结果表明该材料的折射率随着温度的升高而下降，相对于一般无机材料具有较大的热光系数；同时该材料具有明显的双折射现象。由Sellmeyer方程得到了该材料的Sellmeyer系数及色散曲线。这对进一步研究新型数字热光和全光开关等光电子器件具有重要意义。
A new azo polyurethane with chiral atoms was synthesized with 4-nitroaniline, sodium nitrite and S （-）-a-methylbenzylamine by diazo coupling reaction. The absorption spectrum of this novel azo polyurethane with chiral atoms was characterized by UV-Vis spectroscopy. The solubility was measured with different kinds of organic solution. And the thermal property was characterized by X-5 micro melting point apparatus, by which the melting point is 165℃. This result show that the new azo polyurethane had excellent thermal stabili- ty. Mechanical properties of the novel polyurethane with chiral atoms, such as tensile strength and hardness, were also studied. The refractive index of the polymer waveguide thin film was detected by attenuated total reflection （ATR） method at different temperature, wavelength and mode of the incident light. The results show that the refractive index of the material decreases with the temperature rising. Compared with inorganic materi- als, the new material has a bigger thermo-optic coefficient. At the same time, the dispersion coefficient was cal- culated by the Sellmeyer equation. The thermo-optical coefficients of the material for TM （transversal magnet- ic） and TE （transversal electric） modes were also studied and they are obviously different, which can be used to design and develop the novel thermo-optic switch and even all-optical switch in the future.
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