Abstract

We studied the effect of a di-acrylic oligomer on electro-optical performances of a flexible PDLC formulation by UV-curing phase separation technique. The study included the behavior of optical transmissions and switching voltages of PDLC as function of low concentration range of 2.5-25.5 weight percent of oligomer. The results showed improvements of all optical transmissions and saturation voltage, except the threshold voltage, at around 10% range of oligomer concentration. We discussed these results on the bases of different morphologies and surface anchoring originating from refractive index and photo-initiator effects of oligomer.

Keywords:Oligomer; Liquid crystal; Optical transmission; Contrast ratio; Haze; Applied voltage