高分子混合液晶薄膜光電特性之研究

Abstract

本論文主要探討摻雜重量百分濃度3－80 wt%的高分子混合液晶薄膜光電特性。利用偏光顯微鏡及電子顯微鏡觀察發現薄膜表面形態會根據摻雜高分子單體濃度的不同而改變，其形態改變範圍為相分離→兩相結構(液晶微滴)→單相結構(球晶)→獨立球晶→多晶結構。 我們並量測不同濃度的高分子混合液晶薄膜的電壓與穿透率、電壓對相位變化及遲滯效應等光電特性來進行討論並歸納出相對應的濃度和不同的製程方式所得到的光電特性。

We investigated the electro-optical properties of liquid crystal-polymer (LC-polymer) composite films with the polymer concentration in the range of 3 wt% to 80 wt%. The morphology of the polymer composite films was studied by using the polarized optical microscope and the scanning electron microscope. A variety of morphologies ranging from macro-phase separation, polymer-dispersed LC droplets, single-phase nematic spherulites, isolated spherulites, to amorphous structure was observed depending upon the polymer concentration in LC-polymer composite films and irradiation temperature. The voltage-dependent transmittance, phase retardation, and hysteresis effect of LC-polymer composite films were also measured in this work. The electro-optical properties of LC-polymer composite films were strongly depending on the morphologies.