Application for Micro-electronics of Polymer/(Liquid Crystal) Hybrid Thin Films

(1)聚合物/(液晶)杂化薄膜的制备和聚集结构聚合物/(液晶；(LC))杂化薄膜由无定形聚合物和氰基联苯型液晶组成。形态观察和热分析表明，液晶相在基质聚合物的三维网络结构中形成了连续相。聚合物/液晶杂化薄膜的电光效应当聚合物/液晶复合材料形成互穿结构时，杂化薄膜表现出明显的光散射。在关断电场作用下，分别观察到了可逆的(光散射)-(光传输)开关。最近有人提出，液晶导向器的空间扭曲是表现出强光散射态的必要条件。介电分析表明，光开关速度依赖于基质聚合物的介电常数和电导率的大小。基于杂化薄膜的电学性质，成功地改善了杂化薄膜的光开关响应特性。与扭曲向列型显示器相比，聚合物/液晶杂化薄膜作为电光器件具有独特的优势：1)明亮的显示器，2)宽视角，3)快速衰减响应，4)大面积和5)柔性。

(1) Preparation and Aggregation Structure of Polymer/(Liquid Crystal) Hybrid Thin Films Polymer/(liquid crystal ;(LC)) hybrid thin films composed of amorphous polymers and cyanobiphenyl type LCs were prepared by casting from a mixture solution. It was clear from the morphological observation and the thermal measurement that the LC phase formed a continuous phase in three dimensional network structure of the matrix polymer. The size of LC domain was controlled by the kinetic parameters during preparation process.(2) Electro-optical Effect of Polymer/LC Hybrid Thin Films When the polymer/LC composite formed a mutual interpenetrating structure, the hybrid thin film showed remarkable light scattering. A reversible (light scattering)-(light transmission) switching was observed under off-on applied electric field, respectively. It was newly proposed that a spatial distortion of the LC directors is required to exhibit a strong light scattering state. The dielectric analysis for the hybrid thin film revealed that the light switching speed was dependent on the magnitudes of dielectric constant and electric conductivity of the matrix polymer. The response characteristics of light switching of the hybrid thin film was successfully unproved on the basis of electric properties of the hybrid thin film. The polymer/LC hybrid thin film has unique advantages as electro-optical devices in comparison with a twisted-nematic display with respect to: 1)bright display, 2)wide viewing cone angle, 3)fast decay response, 4)large area and 5)flexible.