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Liquid Crystals and their Application
Russian Journal

Zhidkie kristally i ikh prakticheskoe ispol'zovanie

Жидкие кристаллы и их практическое использование

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Zhidk. krist. ikh prakt. ispol'z. = Liq. Cryst. and their Appl., 2009, 3, 48—54.





Volume Properties of the p-n-Hexyloxybenzoic Acid – p-n-Heptyloxybenzoic Acid System



S. A. Syrbu1, Z. A. Kudryashova2,3, L. A. Nosikova2,3

Author affiliations
1Ivanovo State University, Inorganic Chemistry Department
Ermak 39, Ivanovo, 153025 Russia. 
E-mail: syrbue@yandex.ru
2Lomonosov Moscow University of Fine Chemical Technology,
119571 Moscow, Russia, prospect Vernadskogo, 86
3Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences,
Leninskii pr., 31, Moscow, 119991 Russia

Abstract
P-n-hexyloxybenzoic acid – p-n-heptyloxybenzoic acid system is reseached by dilatometric method. Analysis of temperature and concentration dependencies of system volume properties was done. Density and its derivates values at equimolar correlation of components are extremal. Detected experimental fact confirms the «cross» dimmers of acids formation in this system.

Keywords: liquid crystals, p-n-alkyloxybenzoic acids, polythermal dilatometry, dimmers, density, molecular packing coefficient, thermal expansion coefficient, excessive molar volume





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