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

M.C.W. Boxtel, van, R.H.C. Janssen, C.W.M. Bastiaansen, D.J. Broer

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Abstract

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
Original languageEnglish
Pages (from-to)838-842
JournalJournal of Applied Physics
Volume89
Issue number2
DOIs
Publication statusPublished - 2001

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