光学学报, 2008, 28 (12): 2379, 网络出版: 2008-12-17
掺杂型聚合物的电晕极化特性及其机理研究
Characteristics and Mechanisms of Corona Poling of Chromophore-Doped Polymers
摘要
实验研究了聚甲基丙烯酸甲脂(PMMA)掺杂生色团分散红DR19的电光聚合物的电晕极化特性。结合吸收光谱法和显微镜形貌分析了极化电压、极化温度以及极化时间对极化效果的影响。理论和实验分析得出极化电压增大可以增大聚合物内部极化电场, 但电压过大会引起薄膜击穿而降低极化效果; 而极化温度升高可以增大分子取向力, 但在聚合物玻璃化温度以上会导致相分离; 极化时生色团分子的取向随时间增大并逐渐达到动态平衡。实验结果表明:表征极化效果的序参数随极化电压的增大而先增大后减小, 随极化温度的升高而先增大后减小, 随极化时间的增长先增大后趋于稳定。
Abstract
The corona poling characteristics of the electro-optic polymer (chromophore DR19-doped PMMA) have been studied experimentally. The poling effects by poling parameters (voltage, temperature and time) on corona poling process have been analyzed by UV-Vis absorption spectroscopy and microscope. The electric fields inside the films increase with poling voltage, but the electric breakdown may occur with too high poling voltage. The chromophore orientation energy increases with poling temperature, but the phase separation may occur when the temperature higher than the vitrification temperature of polymer. The chormophere orientation increases with increasing poling time and reaches the dynamic balance at last. With increasing poling voltage, the order parameter which represents the poling effects increases to a maximum and then drops. Also the same trend of the order parameter has been obtained with increasing poling temperature. While the order parameter increases and reaches saturation with increasing poling time.
恽斌峰, 胡国华, 吕昌贵, 周昊, 崔一平. 掺杂型聚合物的电晕极化特性及其机理研究[J]. 光学学报, 2008, 28(12): 2379. Yun Binfeng, Hu Guohua, Lü Changgui, Zhou Hao, Cui Yiping. Characteristics and Mechanisms of Corona Poling of Chromophore-Doped Polymers[J]. Acta Optica Sinica, 2008, 28(12): 2379.