ACOUSTIC STUDY OF RELAXATION PROPERTIES OF ZHK-1282 NEMATIC LIQUID CRYSTAL IN VICINITY OF NEMATIC-ISOTROPIC PHASE TRANSITION
Abstract
The viscous and elastic properties of a ZhK-1282 nematic liquid crystal (NLC)
were studied in a temperature interval from 290 to 360 K by method of ultrasonic spectroscopy
in the 3-63 MHz frequency range. The temperature dependences of the NLC
density and shear viscosity are presented. The results of measurements of the velocity and
ultrasound absorption and the shear viscosity were used to calculate the volume viscosity
coefficient, the moduli of elasticity and isothermal compressibility, the relaxation times of
both elastic and viscous properties, and the corresponding critical characteristics of the
given NLC.
were studied in a temperature interval from 290 to 360 K by method of ultrasonic spectroscopy
in the 3-63 MHz frequency range. The temperature dependences of the NLC
density and shear viscosity are presented. The results of measurements of the velocity and
ultrasound absorption and the shear viscosity were used to calculate the volume viscosity
coefficient, the moduli of elasticity and isothermal compressibility, the relaxation times of
both elastic and viscous properties, and the corresponding critical characteristics of the
given NLC.
About the Authors
В. Сурнычев
Московский государственный областной университет
Russian Federation
Russian Federation
В. Беляев
Московский государственный областной университет
Russian Federation
Russian Federation
Е. Банникова
Московский государственный областной университет
Russian Federation
Russian Federation
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