Influence of non-mesogenic impurities on a nematic to isotropic phase transition

被引：21
|
作者：
Mukherjee, PK
机构：
[1] Department of Physics, University of Calcutta, Calcutta, 700, 009, 92, Acharya Prafulla Chandra Road
来源：
LIQUID CRYSTALS | 1997年 / 22卷 / 03期
关键词：
D O I：
10.1080/026782997209289
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Non-mesomorphic solutes depress the normal nematic-isotropic transition temperature in liquid crystals. When non-mesomorphic solutes are added to a nematic liquid crystal, the nematic-isotropic transition temperature is depressed and a two phase region is formed due to the presence of impurities of the solutes. The present paper explains the formation of this two phase region by the Landau-de Gennes phenomenological theory, which agrees fairly well with the experimental observations. We also note that this two phase region indicates the tricritical behaviour of the nematic-isotropic phase transition and the phase diagram near the tricritical point is also obtained.
引用
收藏
页码：239 / 243
页数：5
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