Homogeneous and Homeotropic Alignment Achieved by the Same Photoalignment Material-Polycinnaamate

Abstract

We have investigated the alignment phenomena of some liquid crystals, which have different Δ ε values, on the newly synthesized polycinnamate according to the linearly polarized UV exposure method. The liquid crystals having positive Δ ε value aligned homogeneously to the direction perpendicular to the transmission axis of sheet polarizer used in our experiment, but those having negative Δ ε value aligned homeotropically to the direction parallel to the transmission axis of polarizer.