On the nature of the smectic mesophase in 8CB+10CB binary mixtures.: Evidences for a smectic A to nematic tricritical point

被引:24
作者
Lafouresse, MG
Sied, MB
Allouchi, H
López, DO
Salud, J
Tamarit, JL
机构
[1] Univ Politecn Catalunya, ETSEIB, Dept Fis & Engn Nucl, LCM, E-08028 Barcelona, Spain
[2] Fac Pharm, Chim Phys Lab, F-37200 Tours, France
关键词
D O I
10.1016/S0009-2614(03)00904-7
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The two-component system octylcyanobiphenyl(8CB) + decylcyanobiphenil(10CB) has been studied by means of Modulated Differential Scanning Calorimetry, optical microscopy and X-ray diffraction. Although the general trends of the phase diagram are similar to that proposed by Marynissen et al., additional evidences for the existence of TCP have been reported, the composition being about 0.2, which is slightly lower than that proposed in the aforementioned work. Additionally, the smectic mesophase of the 8CB + 10CB mixtures has been characterised through X-ray diffraction and optical measurements as smectic A for the whole composition range. Such a result is against the recent work of Oweimreen and Hwang. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:188 / 193
页数:6
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