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Effect of Curing Process on the Dynamic Response of Polymer Dispersed Liquid Crystal Films |
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| Authors: | Fatima Zohra Abdoune Leila Benkhaled Lahcène Méchernène Ulrich Maschke |
| Institution: | 1. Unité Matériaux et Transformations UMET (UMR CNRS N° 8207), Bâtiment C6, Université de Lille 1 - Sciences et Technologies, F-59655 Villeneuve d'Ascq Cedex, France
Laboratoire de Recherche sur les Macromolécules, Département de Physique, Faculté des Sciences, Université Aboubakr Belkaïd de Tlemcen, 13000 Tlemcen, Algeria;2. Unité Matériaux et Transformations UMET (UMR CNRS N° 8207), Bâtiment C6, Université de Lille 1 - Sciences et Technologies, F-59655 Villeneuve d'Ascq Cedex, France;3. Laboratoire de Recherche sur les Macromolécules, Département de Physique, Faculté des Sciences, Université Aboubakr Belkaïd de Tlemcen, 13000 Tlemcen, Algeria |
| Abstract: | Summary: The time relaxation of the optical transmission of polymer-dispersed liquid crystal films was investigated after application of an electric rectangular pulse. These films, consisting of liquid crystalline microdomains dispersed in a polymer matrix, were obtained by polymerization induced phase separation using ultraviolet and electron beam curing techniques. The effects of the curing procedure and film thickness on the transmission properties were investigated. The electro-optical response was expressed via a hierarchy of order parameters. A good agreement between the experimental data and calculated transmission values was found. |
| Keywords: | liquid crystals optical properties phase separation polymers relaxation |