DYNAMIC PROPERTIES OF ORIENTED LIQUID CRYSTALS IN LOCALITY OF PHASE TRANSITIONS AT HIGH PRESSURES

The investigation object is the p-n-butoxybenziliden-n-butyl aniline (BBBA). The aim is to study the influence of the R, T-thermodynamic state parameters on the dynamics of the molecular processes in the liquid crystals (LC) including fields of the phase transitions NZhK-SZhK "A" and NZhK-IZh by an acoustic method on the ultrasonic frequency 6,4 MHz. The experiment methods for study of the acoustic parameters in the static and variable magnmetic fields have been improved. The influence of the temperature and pressure on the time of the "structural" relaxation and on the time of relaxation of the oriented ordering parameter, on the volumetric and shift viscosities of BBBA and also on the dynamics of the given NZhK behaviour in the rotating magnetic field has been investigated by an acoustic method. The influence of the pressure in the interval up to 120 MPa on the temperatures of the phase transitions and on the time of the oriented relaxation has been investigated firstly by an acoustic method on the frequency 6,4 MHz. The obtained data are necessary at development of the devices and facilities of electrooptics, information engineering etcAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio