Ultrasonic and viscometric investigations of a poly(vinyl alcohol)–dextran mixture in aqueous solution

Abstract

Ultrasonic spectroscopy provided a powerful, efficient, and reliable tool for a number of investigations, including those of polymer solution dynamics, molecular interaction, and the miscibility and compatibility of biopolymers in aqueous solutions. Ultrasonic velocity and related acoustic parameters were measured as a function of the concentration of poly(vinyl alcohol) (PVA), dextran, and a PVA-dextran mixture in water with the resonance method at a frequency of 3 MHz over a temperature range of 20 -50°C. From the comparative results of sound velocity, density, adiabatic compressibility, acoustic impedance, and viscosity relaxation time as a function of temperature and concentration, the mode of interaction and the compatibility and miscibility between the two biologically active macromolecules were probed and were considerable at all concentrations and temperatures because of crosslinking via hydrogen bonding involving the hydroxyl groups of both of the biomacromolecules. The interpretations of the acoustic results were confirmed by the intrinsic viscosities of the ternary systems. The significant interaction and compatibility of these biopolymers should lead to the development of pharmaceutically active molecules.

Effect of Anionic Surfactant on the Thermo Acoustical Properties of Sodium Dodecyl Sulphate in Polyvinyl Alcohol Solution by Ultrasonic Method

“…It shows a maximum at higher mole fraction. It is also evident for the interaction between sodium dodecyl sulphate and polyvinyl alcohol solution 19,24 .…”

“…However, if the concentration of SDS is increased, it can be seen that, the classical absorption also increases. This may be due to the fact that the maximum reaction takes place at higher concentration 24 . The results of absorption coefficient as a function of mole fraction show that the transfer of energy (de-excitation of a molecule) is more probable between two different molecules than with molecules of the same species 25 .…”

Physico-Chemical Analysis on Some Polymers in Aqueous Surfactant Solution at Different Temperatures: Acoustical, UV and FTIR Studies

“…This is due to the fact that the maximum reaction takes place at higher concentration [17]. The result shows that the transfer of energies more probable between two different molecules than with the molecules of the same species [18]. Free volume is the null space between the molecules because of rough packing of molecules.…”

Sonochemical Compatibility of Polyvinyl Alcohol/Polyacrylic Acid Blend in Aqueous Solution

“…[9][10][11][12] Water soluble polymers such as PVA and PA have occupied an emerging area of investigations by researchers because of their versatile pharmaceutical and industrial applications. [13,14] These include the preparation of many biomedical products [15][16][17] through degradation and grafting onto the polymers. Several workers [18,19] have used ultrasonic velocity, together with viscosity and density measurements, to study polymer-solvent and polymer-polymer interactions.…”