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 (similar to20 merg cm(-2)) and the adsorption part of the latter (similar to7 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 (similar to1 h) and probably controlled by adsorption-desorption of liquid crystal molecules at the interface.
Dynamics of liquid crystal azimuthal anchoring at a poly(vinyl cinnamate) interface measured in situ during polarized UV light irradiation
BARBERI, Riccardo Cristoforo;
2002-01-01
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 (similar to20 merg cm(-2)) and the adsorption part of the latter (similar to7 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 (similar to1 h) and probably controlled by adsorption-desorption of liquid crystal molecules at the interface.File in questo prodotto:
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