Studies on miscibility of sodium carboxy methyl cellulose/ poly (ethylene glycol) blends

Miscibility studies have been conducted on solutions of blends of Sodium Carboxy Methyl Cellulose (NaCMC) and Poly (ethyleneglycol) (PEG) over an extended range of concentrations in water. The Viscosity , Ultrasonic velocity, density, and refractive index of the blends have been measured for different compositions viz., 0/100, 20/80, 40/60, 50/50, 60/40, 80/20 and 100/0 of NaCMC/PEG blends in water at 300 C. The interaction parameters such as ∆B, µ and α calculated from viscosity results using Chee and Sun methods indicate that NaCMC/PEG blend is miscible when NaCMC content is more than 50% in the blend. The obtained conclusions have been confirmed by ultrasonic velocity and refractive index results also. The NaCMC/PEG blend films are prepared by solution casting method and are analyzed by Fourier Transform Infrared Spectroscopy, Differential Scanning Calorimetry, X-ray diffraction and Scanning Electron Microscopic techniques that confirmed the semi miscibility nature of this blend.