Polarization characteristics of polymer dispersed liquid crystal films and their effects on electro-optical properties

The electro-optical properties of polymer dispersed liquid crystal films vary with contents and applied electric field, but the analysis film morphology cannot directly reflect mechanism properties. Therefore, prepared by blending material E7 photopolymer NOA65 was applied. Herein, dielectric polarization regulated their related under different fields are revealed. results show that in frequency range 10<sup>-1</sup>~10<sup>6</sup> Hz, exhibits three relaxation processes low frequency, medium high separately, which generated thermionic polarization, interfacial orientation respectively. According to Arrhenius equation, activation energy such were calculated. It found increase content, decreased from 0.88 eV 0.83 eV, resulting decrease threshold field strength saturation diversion molecule. Thermionic DC forms an internal a large strength, as compared situations AC field. Such also leads time, extension response time. This study shows guiding significance for further improvement films.