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

(1)聚合物/（液晶）杂化薄膜的制备及聚集结构采用混合溶液浇铸法制备了由非晶聚合物和三苯基型液晶组成的聚合物/（液晶）杂化薄膜。形态学观察和热测量表明，LC相在基体聚合物的三维网络结构中形成连续相。在制备过程中，动力学参数控制了LC畴的大小。(2)聚合物/LC杂化薄膜的电光效应当聚合物/LC复合材料形成互穿结构时，杂化薄膜表现出显著的光散射。在外加电场的开关作用下，分别观察到可逆的（光散射）-（光透射）切换。在此基础上，提出了LC定向器必须具有一定的空间畸变才能表现出强光散射态。对杂化薄膜的介电分析表明，光开关速度取决于基质聚合物的介电常数和电导率的大小。在杂化薄膜电学特性的基础上，成功地验证了杂化薄膜的光开关响应特性。与扭曲向列显示相比，聚合物/LC混合薄膜作为电光器件具有以下优点：1)显示亮度高；2)视锥角宽；3)衰减响应快；4)面积大；5)柔性强。

(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.