Molecular relaxations in dual-frequency nematic liquid crystals |
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| Authors: | M Mrukiewicz P Perkowski K Garbat R Dąbrowski |
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| Institution: | 1. Faculty of Advanced Technologies and Chemistry, Military University of Technology, Warsaw, Polandmmrukiewicz@wat.edu.pl;3. Faculty of Advanced Technologies and Chemistry, Military University of Technology, Warsaw, Poland |
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| Abstract: | The preparation of nematic liquid crystals mixtures results in changing of molecular relaxations in comparison to pure substances. Typical example is the creation of dual-frequency nematic liquid crystals using a base mixture and functional admixtures. In this paper, we present how dielectric properties of starting compounds change at mixture preparation. Three dual-frequency nematic mixtures of different composition were prepared and examined by means of dielectric spectroscopy in a wide frequency (100 Hz to 10 MHz) and temperature range (170°C to ?60°C). Parameters of detected modes for pure compounds and final mixtures were calculated and their relationships with crossover frequency are discussed. |
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| Keywords: | nematic liquid crystal dual-frequency nematic liquid crystal relaxation frequency crossover frequency |
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