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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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Rus Eng

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Zhidk. krist. ikh prakt. ispol'z. = Liq. Cryst. and their Appl., 2010, 3, 46—56.





Mesomorphic and Volume Properties of p-n-Butyloxybenzylidene- p'-Methylanyline – p-n-Pentyloxybenzoic Acid System



S. A.Surby1, A. A. Surby2, I. V. Bagazhkov2

Author affiliations
1Ivanovo State University,
Ermak 39, Ivanovo, 153025 Russia. 
E-mail: syrbue@yandex.ru
2Ivanovo Institute of the State Fire Service,
Stroitelei pr. 33, Ivanovo, 153040 Russia

Abstract
The p-n-butyloxybenzyliden-p'-methylanyline – p-n-pentyloxybenzoic acid system is investigated by polarizing thermomicroscopy and polythermal dilatometry methods. System phase diagram was plotted. The analysis of temperature and concentration dependencies of the system volume properties was carried out. It is shown, that p-n-pentyloxybenzoic acid «building» into p-n-butyloxybenzyliden-p'-methylanyline takes place at the acid concentration of 10,00 mol. % at the nematic and isotropic phase areas.

Keywords: liquid crystals, phase transitions, phase diagram, p-n-pentyloxybenzoic acid, p-n-butyloxybenzyliden-p'-methylanyline, polythermal dilatometry, density, molecular packing coefficient, thermal expansion coefficient, excessive molar volume





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