Bulg. J. Phys. vol.49 no.2 (2022), pp. 136-144

Thermoacoustical Analysis of Polymer Dextran at Different Frequencies

Subhraraj Panda
Department of Physics, Centurion University of Technology and Management, Odisha, India
Abstract. In recent years, measurement of ultrasonic velocity is helpful to interpret solute-solute, solute-solvent interaction in aqueous medium. The ultrasonic speed (U), density (ρ) and viscosity (η) at 313 K have been determined using ultrasonic interferometer at four different frequencies i.e. 1, 5, 9 and 12 MHz, pycnometer and Ostwald's viscometer of dextran in aqueous medium respectively. All the three measurements were carried out in a water bath of constant temperature with an uncertainty of ± 0.1°C. The derived acoustical parameters such as free volume (Vf), internal pressure (πi), absorption coefficient (α), molar sound velocity (R) and molar sound compressibility (W) have been determined from experimental data. The outcomes are described in terms of molecular interaction between the solution components.

doi: https://doi.org/10.55318/bgjp.2022.49.2.136

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