Effect of Temperature on Some Rheological Properties of Polyvinyl Pyrrolidone (PVP)

Some of the rheological properties of polyvinyl pyrrolidone (PVP) as a function of temperature had not been studied. The relative, specific, reduced, intrinsic viscosities, effective molecular radius and molecular weight were determined in this work. Different dilute concentrations dissolved in distilled water using Ostwald Viscometer have been used. Results show that shear, relative, specific, reduced viscosities increase with increasing the polymer concentrations and also show that these types of viscosities decrease with increasing the temperature. Results also show that intrinsic viscosity and molecular weight values that have been experimentally obtained have good agreement with the theoretical values which were obtained by the use of Pilipoff and Arrhenus equations. Hence, it is concluded that the method has a high precision for estimating intrinsic viscosity and molecular weight.