Keywords : PDLC
Engineering and Technology Journal,
2016, Volume 34, Issue 4, Pages 521-527
Recently, has been studied the electro-optical properties of the polymer dispersed liquid crystal (PDLC) systems because it has unique properties use in smart windows technology. The selection of material is important for performance and application of polymer dispersed liquid crystal devices. The choosing of the materials are based on the physical properties of each constituent materials like refractive matching/ mismatching of Liquid Crystals and polymers, their purity, chemical and photo stability, mutual miscibility etc. The size, shape, and arrangement of these microscopic structures are (droplet) synthetic chemistry of the both constituent molecules. In this present work has been used commercially available nematic liquid crystal ZLI-3239 and UV curable polymer (NOA-71) was used as matrix element. This polymer is clear, colorless, liquid photopolymer that is cured under UV light. The main idea of this research is mixing both the liquid crystal and the polymer in liquid state which both having almost same viscosity to form single liquid phase followed by phase separation processes to separate liquid crystal from the polymer. The polymer is provided sit for liquid crystal which has arrangement of microscopic structures droplet in different sizes. This research showing effect of the temperature and electrical field on the liquid crystal which has direct influence on the optical properties of polymer dispersed liquid crystal film.