Birefringence of binary liquid crystalline mixtures of MBBA and PPMAECOBA in TCM,interferometric assessment |
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| Authors: | Mihai Postolache Nicoleta Puică-Melniciuc Gabriel Grigore Mariciuc Dan Gheorghe Dimitriu Dana Ortansa Dorohoi |
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| Affiliation: | 1. Faculty of Automatic Control and Computer Engineering, “Gheorghe Asachi” Technical University, Ia?i, Romania;2. Faculty of Orthodox Theology, “Alexandru Ioan Cuza” University, Ia?i, Romania;3. Faculty of General Medicine, “Gr. T. Popa” University of Medicine and Pharmacy, Ia?i, Romania;4. Faculty of Physics, “Alexandru Ioan Cuza” University, Ia?i, Romania |
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| Abstract: | AbstractThe mutual influence of two mesogenic components, namely a nematic liquid crystal N-(p-methoxy-bezylidene)-butylaniline (MBBA) and a lyotropic liquid crystal poly-(phenyl-methacrylic) ester of cetyloxybenzoic acid (PPMAECOBA) in tetra-chloromethane (TCM) is studied in this paper. The ordinary and extraordinary refractive indices of the mixtures, nematic liquid crystal and lyotropic liquid crystal were measured at 589.3?nm with a Rayleigh interferometer and some electro-optical parameters were computed. The main refractive indices, the birefringence, the main normalized polarizabilities and their difference are dependent on the mixture volumetric concentrations, proving the existence of the collective orientational interactions between the two types of liquid crystals. |
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| Keywords: | Birefringence host-guest interactions main refractive indices MBBA nematic liquid crystal normalized polarizability PPMAECOBA in TCM |
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