DESTRUCTION OF AN INTERCALATED STRUCTURE IN A SMECTIC-A PHASE

被引:7
|
作者
HADDAWI, S [1 ]
DEMUS, D [1 ]
DIELE, S [1 ]
KRESSE, H [1 ]
PELZL, G [1 ]
WEISSFLOG, W [1 ]
WIEGELEBEN, A [1 ]
机构
[1] MARTIN LUTHER UNIV HALLE WITTENBERG,MAX PLANCK GESELL & ARBEITSGRP FLUSSIGKRISTALLINE SYST,O-4020 HALLE,GERMANY
关键词
INTERCALATED S(A)-PHASE; MIXTURE; SHORT RANGE INTERACTION; CALORIMETRIC; DIELECTRIC X-RAY STUDIES;
D O I
10.1080/10587259408046919
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
The destruction of the intercalated smectic A structure of a laterally bulky branched 1,4-phenylen dibenzoate A by addition of a rodlike cinnamate B was studied by the phase diagram as well as by calorimetric, x-ray and dielectric measurements. The thermal stability of the S(A) phase of compound A and its phase transition enthalpy decrease with increasing concentration of B. Furthermore, the destruction of the short range order of A is characterized by increasing layer distances, decreasing dipolar correlation and an increasing dielectric relaxation frequency only of component A.
引用
收藏
页码:109 / 116
页数:8
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