Viscoelastic liquid crystal colloids for the continuous processing of twisted nematic electro-optical cells

Autor: Marysia C. W. van Boxtel, Dick J. Broer, Cees W. M. Bastiaansen, Rob H. C. Janssen
Jazyk: angličtina
Rok vydání: 2001
Předmět:
Zdroj: Journal of Applied Physics, 89(2), 838-842. American Institute of Physics
ISSN: 0021-8979
Popis: Liquid crystal colloid materials are described based on the liquid crystal (LC) E7 and submicron sized poly(methyl methacrylate-co-divinylbenzene) particles. Application of a thermal treatment to the composite material produces a finely dispersed network of the internally crosslinked polymeric inclusions in the LC-E7. Dynamic rheological measurements on the LC colloids show that the presence of this network imposes pronounced viscoelastic behavior on the material, which may be exploited in the manufacturing of large-area twisted nematic (TN) electro-optical cells via continuous methods as an alternative to the currently available batchwise routes. The electro-optical characteristics of TN cells based on the composite material are approximately comparable to the electro-optical characteristics of a reference cell filled with pure LC E7, which ensures that the largely increased viscoelasticity of the composite does not lead to a degradation of electro-optical properties.
Databáze: OpenAIRE