Temporal Changes of Molecular Alignments of Nematic Liquid Crystals

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Abstract
Temporal changes of the molecular alignments on nematic liquid crystals are considered dynamically on the basis of experimental results, computer simulations of conoscopic figures and the Voigt model in viscoelastic theory. By assuming the molecular alignments of liquid crystals to follow the modified trapezoidal approximation model, the conoscopic figures obtained from the computer simulations agree semi-quantitatively with those from the experiments. It becomes clear from the Voigt model that the sharpness of isogyre of the conoscopic figures depends on the number of aligned thin molecular layers corresponding to the applied voltage; this is reconfirmed from computer simulations of the conoscopic figures.