2022   04   az   p.28-31 V.M. Aliev, 1J.A. Rahimov, 1Sh.Sh. Amirov, 2G.A. Alieva,
Theoretical and experimental study of dielectric polarization in thermotropic monomer and polymer liquid crystals with reentrant mesomorphic modification		  pdf 

ABSTRACT

In this work, the optical and dielectric properties of liquid crystal 4-(4`-nonyloxybenzyloxy)-phenyl-azobenzonitrile (NBFB), which has the main nematic phase at temperatures in the range of 212°S - 245°S, were studied. Smectic A state (SA) is observed in the interval 116°S - 212°S. The reentrant-return nematic phase is present in the interval 94°S - 116°S. The main refractive indices of the liquid crystal were measured in the entire temperature range of the existence of the mesophase: they were determined at the value of the wavelength of 578 nm of extraordinary and ordinary light.

Keywords: mesophase, phase transitions, monomer, oligomer and polymer liquid crystals
PACS: 74.25. Fy

DOI:-

Received: 21.11.2022

AUTHORS & AFFILIATIONS

1. Institute of Physics Ministry of Science and Education Republic of Azerbaijan, 131 H.Javid ave, Baku, AZ-1143, Azerbaijan
2. Azerbaijan Medical University, 23 Bakikhanov str., Baku AZ 1022
3. Institute of Petrochemical Processes of the Ministry of Science and Education, 30 Khojaly ave. Baku AZ 1025
E-mail: v_aliev@bk.ru, javanshir.rahimov@mail.ru 		REFERENCIES

[1]   Д.А. Рагимов. Молекулярная структура и макро¬ско¬пические свойства макромолекул, Баку: Элм, 2002, 170.
[2]   Р. Дикерсон, Г. Грей, Дж. Хейт. Основные законы химии: В 2-х томах. Пер. с англ. М.: Мир, 652 с., ИЛ. т. 1, 1982.
[3]   Xiu-Jiu Wang, Qi-Feng Zhou. Synthesis and liquid crystalline properties of alkylsubstituted polyesters,Liquid Crystalline Polymers. Singapore: World Scientific, 2004, 388-393.
[4]   H. Wermter, H. Finkelmann. Preparation of molekular inprinted polymers using by funrtional monomer and hi-crosslinker for solid phaze extraction of rutin, e-Polimers, 2012, 4 № 1 150-186.
[5]   M. Yanada, M. Kondo, J. Mamiya, M. Kinoshita, C. Barrett, T. Ikeda. Photoresponsive liquidcrystalline polymer films bilayered withe an inverse opal structure, Angew. Chem. Int. Ed. Nagatsura, Nidori-ku, Yokohama, 2008, 226-8503 47, 4986-499.
[6]   R. Yerushani, A. Scherz, M. Van der Boom, H. Kraatz. Stimuli responsive materials: new avenus toward smart organic devices, J. Mater. Chem., 15, 2005, 4480-4488.
[7]   T. Yoshioka, T. Ogata, T. Nonaka, M. Moritsugu, S.K. Kurihara. Viscosity in two dimensions the Eighteen the Elephant, Adv. Mater., 2005, 1226-1233.
[8]   H. Yu, Y.Naka, A. Shishida, T. Ikeda. Dissecting entropic coiling and poor solvent effects in proteion collapse, Macromolecules, 2008, 41, 7959-7965.
[9]   С.С. Сологубов, А.В. Маркин, Н.Н. Смирнова, А.М. Музафаров. Калориметрическое изучение карбосилановых дендримеров, Вестник Нижегородского университета им. Н.И. Лобачевского, 2014, 4, 1, 122-129.