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具有A-π-D电子结构的苯胺衍生物掺杂的玻璃态高聚物PMMA的有机薄膜经极化取向后显示很强的二次非线性光学性能,其取向弛豫是实用化的一个有待解决的重要问题。木文通过几种苯胺衍生物以不同百分比与PMMA掺杂,用紫外-可见吸收光谱、二次谐波强度测量、动态力学粘弹谱等方法进行了取向弛豫的机理研究,结果表明分子尺寸和形状以及偶极矩的大小对取向弛豫有显著影响。
The organic thin films of glassy polymer PMMA doped with aniline derivative with A-π-D electronic structure show strong secondary nonlinear optical properties after polarized orientation, and its orientation relaxation is a practical application Solve the important issue. Through several kinds of aniline derivatives doped with PMMA with different percentages, the mechanism of orientation relaxation was studied by UV-Vis absorption spectra, second harmonic intensity measurement and dynamic mechanical visco-elastic spectroscopy. The results show that the molecular size The shape and dipole moment have a significant effect on the orientation relaxation.