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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., 2012, 4, 81—85. |
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Structural Transition in Isotropic Phase of Smectic Polyacrylate
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S. G. Polushin1, V. B. Rogozhin1, A. V. Zakhryapa1, E. I. Rjumtsev1, N. I. Boiko2
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Author affiliations
1Saint Petersburg State University, Physical Faculty
198504 St. Petersburg, Petrodvorets, Ul’yanovskaya str., 1.
E-mail: polushin@land.ru
2Lomonosov Moscow State University, Chemical Faculty
119991 Moscow, Leninskie Gory, 1
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Abstract
The electric birefringence (Kerr effect) in the melt of a comb-like polymer with acrylate main chain and mesogenic cyanobiphenyl side groups was investigated above smectic – isotropic phase transition temperature. It was revealed that the Kerr constant temperature dependence changes abruptly owing to changes in short-range orientation order at isotropic – isotropic phase transitions.
Keywords: Kerr effect, isotropic phase, comb-like polymer, smectic
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