Thermoacoustical Analysis of Polymer Dextran at Different Frequencies Subhraraj Panda

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 pm0.1 0 C. The derived acoustical parameters such as free volume (V f ,), internal pressure (π i ), 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.