Effect of different monomers on the electro-optical properties of reverse-mode polymer stabilized liquid crystal

Reverse-mode polymer-stabilized liquid crystal (RPSLC) plays an important role in optical display field and becomes one of the research hotspots because of its normal transparent state without driving voltage. The concentration and type of polymer monomer has a great influence on the electro-optical properties of the RPSLC, so the optimization of the polymer monomer can reduce the driving voltage and hysteresis, and improve the contrast ratio of the RPSLC. In this paper, two kinds of V-type and two kinds of linear type monomers with bi-functional group, and a mesogenic monomer were used, the effect of the concentration and type of non-mesogenic monomers on electro-optical properties of RPSLC were studied with the fixed concentration of mesogenic monomer in experiment. The results show that the electro-optical properties of the RPSLC can be improved more when the suitable ratio of a V-type monomer is added. The maximum and minimum transmittances are 85.9% and 3.1%, the contrast ratio is 27.6, the threshold and saturation voltages are 6.4 V and 11.6 V, and the hysteresis is less than 1 V. Combined with the scanning electron microscopy morphology of polymer network, the mechanism of the influence of non-mesogenic monomer on the electro-optical properties of RPSLC is revealed. These experimental results will be of great significance for the research of RPSLC.