Abstract
An automated in situ technique for the measurement of the director reorientation at a nematic-aligning photosensitive polymer interface during polarized UV light irradiation has been developed. Using this technique, the photoinduced azimuthal anchoring energy (≈20 merg cm-2) and the adsorption part of the latter (≈7 merg cm-2) have been evaluated for the E7-poly(vinyl cinnamate) system. The kinetics of the director reorientation have been shown to be a very slow process (≈1 h) and probably controlled by adsorption-desorption of liquid crystal molecules at the interface.
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