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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., 2013, 4, 5—13.





Influence of Non-Mesomorphic Additives on Properties of Liquid Crystalline Materials.
VIII. Volumetric Properties of n-Alkoxybenzoic Acid



V. V.Alexandriysky 1,2, E. V. Bobriskaya 1,2, Burmistrov V. A.1,2, O. I. Koifman 1,2

Author affiliations
1Research Institute of Macroheterocyclic Compounds, Ivanovo State University of Chemistry and Technology,
Sheremetevsky av. 7, 153000 Ivanovo, Russia. 
E-mail: nmr@isuct.ru
2G.A. Krestov Institute of Solution Chemistry of the RAS,
Academicheskaya str. 1, 153045 Ivanovo, Russia

Abstract
Volumetric properties of the individual n-alkoxybenzoic acids and their binary mixtures were studied. Based on the analysis of the temperature dependence of density, molar volume jumps at phase transitions and molecular packing coefficients the effect of the association of the alkoxybenzoic acids by intermolecular hydrogen bonds on the molecular packing in the mesophase and isotropic liquid state was shown. It was found that the addition of non-mesomorphic compounds can result in both compacting and «loosening» of molecular packing due to changes in the ratio of homo- and heteroassociates of benzoic acid derivatives

Keywords: liquid crystals, mixtures, non-mesomorphic additives, dielectric properties, anisotropy, association, H-bond





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