PHASE TRANSITIONS IN LIQUID CRYSTAL EMULSIONS ACCORDING TO ULTRASONIC SPECTROSCOPY DATA

The velocity of propagation and the coefficient of ultrasonic absorption in liquid crystal emulsions in the vicinity of the phase transition from a nematic phase to the isotropic liquid have been studied in the samples with sizes of emulsion components in a range from 100 nm to 5000 nm using ultrasonic technique in the frequency range from 0,6 MHz to 150 MHz. Dispersion parameters of emulsions were supervised by polarizing microscopy and the dynamic light scattering methods. The peculiarities of the temperature dependences of emulsion acoustic parameters connected with structural transformations in sub-micron components of liquid crystal emulsions were established.