氧化偶氮液晶二阶非线性光学聚合物的研究

Study on a Stable Crosslinked Second Order Nonlinear Optical Polymer with a Liquid Crystalline Side Group

将４－［对硝基苯基氧化偶氮苯基］甘油单醚与六亚甲基二异氰酸酯的缩二脲进行电场极化交联反应，合成交联型非线性光学聚合物，并用ＦＴ—ＩＲ光谱和ＤＳＣ对交联反应过程进行了详细研究。利用紫外可见吸收光谱对膜极化前后的取向以及在室温和升温下取向膜的稳定性进行了研究，并对极化膜的非线性光学系数ｄ３３进行了推算。

A crosslinked polymer of the glycerin β-monoether of 4--[ (p-nitrophenyl) azoxy] phenol(GNPAP) with biuret of hexamethylcne-diisocyanate (HDI) was studied by DSC and FT-IR spectra.The orientation and stability of a poled and crosslinked polymer was investigated by UV-Vis spetra.The relaxation of the poled and crosslinked polymer was not observed in 498 hours after poling and crosslinking for 1 hour at 150℃. The macroscopic second order nonlinear optical coefficient d33 was calculcated by a one-dimensional rigid oriented gas model (1D ROGM ).