Abstract
The promising use of liquid crystals for the development of technical devices is substantiated. The acoustic method is used to study the dependence of parameters of liquid crystals on the pressure and temperature, which characterize the operating speed of electronic devices with a liquid-crystalline working fluid. We studied the relaxation properties of mixtures of nematic liquid crystals LC-440 and N-96. Within the framework of the molecular statistical theories of the nematic phase, the dependence of the coefficient of rotational viscosity on temperature and pressure is analyzed. The influence of the structure of molecules and molecular complexes of nematic liquid crystals on the dependence of the coefficient of rotational viscosity on external conditions is established. The results of original studies of the dependence of the coefficient of rotational viscosity on pressure and temperature at a constant volume are presented.
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