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Liquid Crystals

Classification Des Systemes Aux Cristaux Liquides Nematiques

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Pages 47-56 | Received 23 Jan 1995, Published online: 24 Sep 2006
 

Abstract

On a basis of more than 100 complete T-x-diagrams of systems involving nematic liquid crystals (NLC) the dependence for a width of a nematic solution region from the component mesomorpnism type was revealed. A classification for T-x-diagrams of binary systems was elaborated using this relationship and the principles known from the geometry of systems with non-mesogen substances. The classification has include the systems of two monotropic NLC, enantiotropic NLC-non-mesogen, monotropic-enantiotropic NLC. 8 types of systems have been predicted and first investigated by the use of the classification.

L' examen des systèmes aux cristaux liquides nématiques (CLN) contenant environ 100 diagrammes T-x complets montre le rapport entre la position du domaine à solution nématique et le type de mésomorphisme des constituants. En utilisant ce rapport et les régularités connues des systèmes à substances non mésomorphes on a présenté la classification propre de diagrammes T-x des systèmes doubles CLN énantiotrope- non-mésogène, CLN énantiotrope-monotrope, deux CLN monotropes ou énantiotropes. On a formulé huit types de systèmes pronostiqués.

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