Miscibility Studies of Poly(Vinylpyrrolidone)/Poly(Vinyl Alcohol) Blends in Water by Viscosity, Density, Refractive Index and Ultrasonic Velocity Methods
L. R. Shivakumara, B. P. Dayananda, T. Demappa
DOI:
Volume , Issue 2 | Pages: 13-16
Abstract
Poly(vinylpyrrolidone) (PVP)/poly(vinyl alcohol) (PVA) are water-soluble polymer blends; they are used for food
packaging, biomedical, and pharmaceutical applications. The miscibility of PVP/PVA blends in water was studied
by viscosity, density, ultrasonic velocity, and refractive index techniques at 30°C and 50°C. Using viscosity data,
the interaction parameters such as ΔB, μ and α were calculated. These values revealed that PVP/PVA blends are
miscible at all compositions both at 30°C and 50°C. In addition, Fourier transform infrared studies and scanning
electron microscope analysis were the supporting evidence for miscibility of this system. In addition, adiabatic
compressibility (βad), acoustical impedance (Z) and intermolecular free length (Lf) were also computed.
Keywords
Blends Miscibility Interactions Ultrasonic velocity Refractive index.References
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Citation
L. R. Shivakumara, B. P. Dayananda, T. Demappa. Miscibility Studies of Poly(Vinylpyrrolidone)/Poly(Vinyl Alcohol) Blends in Water by Viscosity, Density, Refractive Index and Ultrasonic Velocity Methods. Indian J. Adv. Chem. Sci. -0001; (2):13-16.