聚合物网络稳定铁电液晶中的条纹织构的研究

STUDY OF THE STRIPED TEXTURE IN THE POLYMER NETWORK STABILIZED FERROELECTRIC LIQUID CRYSTAL CELLS

对聚合物网络稳定的铁电液晶体系进行了研究．实验表明，在聚合物网络单体聚合过程中施加低频交变电场，在偏光显微镜下观察到均匀的液晶分子排列出现一新的条纹织构．从体系自由能的角度对条纹织构给出合理的解释．

Abstract A monomer with reactive diacrylate was mixed with a commercial ferroelectric liquid crystal(FLC) mixture and polymerized under U.V. irradiation together with the application of an electric field of ±50V and 10Hz to obtain polymer network stabilized ferroelectric liquid crystals(PNSFLC). Polarized microscope and scanning electron microscopy(SEM) were used to study the molecule texture and the polymer network structure. It is found that the polymer network formed in the SmC * phase is anisotropic and fibrils like , and the PNSFLC cell shows a striped texture. The striped texture is explained by the elastic free energy theory.