PA10 Investigation of order parameter of liquid crystal mixture and dichroic ratio of its guest-host system

Abstract

Good correlation between the order parameter S of liquid crystal (LC) host-mixture and the dichroic ratio of its guest-host system was found out. We investigated temperature dependence of the S value with several LC substances, focusing on its index β. LC substances with a cyano terminal group have smaller β values than those with an alkoxy or a fluoro-substituted terminal. It means that the S value is expected to be larger for the cyano substances than the alkoxy or fluoro substances at a fixed reduced-temperature.