STUDY OF PHASE TRANSITIONS IN p-n-HEPTYLOXYBENZOIC ACID p-n-UNDECYLOXYBENZOIC ACID SYSTEMS

被引：0
|
作者：
Syrbu, S. A. [1 ,2 ]
Kudryashova, Z. A. [3 ,4 ]
Nosikova, L. A. [3 ,4 ]
Efremova, E. I. [3 ]
Kiselev, M. R. [4 ]
机构：
[1] Ivanov State Univ, Dept Inorgan & Analyt Chem, Ul Ermak 39, Ivanovo 153025, Russia
[2] Minist Emergency Situat Russia, Ivanovsky Inst State Fire Serv, Ivanovo 153040, Russia
[3] Moscow MV Lomonosov State Univ, Moscow State Univ Fine Chem Tech, Dept Inorgan Chem, Moscow 119571, Russia
[4] AN Frumkin Russian Acad Sci, Inst Phys Chem & Electrochem, Moscow 119071, Russia
来源：
LIQUID CRYSTALS AND THEIR APPLICATION | 2013年 / 02期
关键词：
liquid crystals; p-n-alkyloxybenzoic acids; polarizing optical microscopy; differential scanning calorimetry; polythermal dilatometry; nematic subphases; associates; density; molecular packing coefficient; excessive molar volume;
D O I：
暂无
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
The p-n-heptyloxybenzoic acid(I) - p-n-undecyloxybenzoic acid (II) system studied by polarizing optical microscopy, differential scanning calorimetry and dilatometric methods. Coordinates of the invariant equilibrium were obtained. Temperature and concentration dependencies of volume properties were analyzed. It was found that in the system there are two nematic and two smectic subphases. For the composition with the ratio of components 2(I): 1(II) the density and its derivatives values are extremal, indicating the formation of acid associates in the system.
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收藏
页码：95 / 103
页数：9
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