强激光与粒子束2011，Vol.23Issue(10)：2801-2805,5.DOI:10.3788/HPLPB20112310.2801
极化条件对偶氮化合物薄膜中分子取向的影响
Effects of polarization conditions on molecular orientation in azo-dye compound film
摘要
Abstract
In order to investigate the influence of polarization conditions on azo-dye molecular orientation in films, azo-dye polymer films of guest-host system were prepared by spin-coating method. The average alignment factor of azo-dye molecules in films were investigated by UV-Vis spectra measured before and after corona poling, as well as second harmonic generation at different corona poling conditions. The experimental results show that the average alignment factor of azo-dye films becomes bigger, and second harmonic intensity first increases and then decreases with the increasing of poling temperature. The closer the poling temperature is to the polymer's glass transition temperature, the more likely the molecules are orientated. However, PMMA will fall into a state of viscosity at too high temperature. A part of azo-dye molecules will evaporate easily at high temperature, making the second harmonic intensity decline and the average alignment factor increase. As the film thickness increases, the inhomogenei-ty of electric field distribution in films increases, which is caused by point-plane corona discharges, the polarization efficiency reduces, and therefore the average alignment factor decreases and the second harmonic intensity first increases and then decreases.关键词
电晕极化/平均取向因子/偶氮化合物/主客体掺杂/紫外-可见吸收谱Key words
corona poling/average alignment factor/azo-dye compounds/guest-host system/UV-Vis spectra分类
数理科学引用本文复制引用
刘云龙,王文军,孙彦星,高学喜,张丙元,俞宪同,赵力涛,邢晓..极化条件对偶氮化合物薄膜中分子取向的影响[J].强激光与粒子束,2011,23(10):2801-2805,5.基金项目
国家自然科学基金项目 (10874063) （10874063）
山东省科技攻关计划项目(2010GGX10127) （2010GGX10127）
山东省优秀中青年科学家科研奖励基金项目(BS2009 DX014) （BS2009 DX014）
山东省高等学校科技计划项目(J101LA60) （J101LA60）
聊城大学科研基金项目(X0810017) （X0810017）
