Physical Review E
The liquid crystal orientation on a poly(vinyl cinnamate) or poly(vinyl 4-methoxy-cinnamate) coated solid substrate exposed to linearly polarized UV light has been studied. The angular distribution of the polymer side chains and the photoreaction products was derived as a function of exposure time using a simple assumption about the probability for crosslinking of two side chains. The liquid crystal was assumed to be weakly anchored to the surface but have a degree of order and orientation determined from those of the polymer side chains. The polar and the azimuthal surface coefficients were estimated as a function of exposure time using the Landau–de Gennes theory and the behavior of a twist cell with polymer plates was studied for the values of the calculated surface coefficients.
Galabova, H. G.; Allender, David W.; and Chen, J. (1997). Orientation and Surface Anchoring of Nematic Liquid Crystals on Linearly Polymerized Photopolymers. Physical Review E 55(2), 1627-1631. doi: 10.1103/PhysRevE.55.1627 Retrieved from http://digitalcommons.kent.edu/phypubs/93