Transient Phenomenon in Polymer-Dispersed Liquid Crystals

Abstract

In the present study, we report the experimental results related to the transient phenomenon, i.e., the time-dependent changes in the electro-optical properties of as-made polymer-dispersed liquid crystal (PDLC) films prepared by the UV-curing phase-separation method. This phenomenon occurs explicitly via polymer-induced phase separation when the matrix curing is not complete, some liquid crystal plasticized in the matrix, and some uncured pre-polymer components remain in the liquid crystal droplets. The outcome is the time-dependent changes in the electro-optical properties of as-made PDLC devices. Here, we provide the experimental results of Transient Phenomenon in a UV cured PDLC film and report on variations in some electro-optical parameters with time.

The effect of a compatible liquid crystal polymer on homogeneous reinforcement of mesogenic and nonmesogenic rigid-rod monomers

“…In Figure 1, we present the transition temperatures of S7/MT, S7/DA, S7/DO and S7/TP blends within the total phase diagrams as a function of S7 volume fraction by both DSC and OM methods. Although these blends exhibited biphasic regions in all transition temperatures, 22,23 but for simplicity, here we only plotted the mean-values of transition temperatures. The interaction parameter χ calculated from the four phase diagrams were smaller than their critical parameter χ c , which confirms their chemical compatibility.…”

On Potential Application of Metallomesogen Materials in Liquid Crystal Displays

“…In recent years a great variety of MOM materials with photoluminescence and water-free proton conduction, electroluminescence, magnetic and electric properties have been synthesised. Some scientific and patent literature are also reported on the potential applications of calamitic and discotic MOMs as dichroic dyes, non-linear optics, thermal recording, thermochromism, passive optical filters, photo-sensing, laser addressing, optical and thermal recording, polarizing flms, radiation absorbing films, ferroelectricity, ferromagneticity, electroconductivity, reaction catalysts, LC intermediates, ink jet and security printing, medicinal and agricultural components [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27].…”