(402b) Formulation of Water-Soluble Polymer Coatings by Modifying Rheological Properties, Atomization, and Coating Strength of Polymer Aqueous Solutions

A novel viscometer equation suitable for the hydrostatic viscometer is developed to characterize rheological behaviors of non-Newtonian fluids. Various additives such as ethanol, polyethylene oxide (PEO), sucrose, and carboxymethyl cellulose (CMC) sodium salt are used to modify rheological properties, atomization, and coating strength of polyvinylpyrrolidone (PVP K90) aqueous solutions. The main objectives of this study are to examine effects of additive amounts such as ethanol, polyethylene oxide (PEO), sucrose, and CMC sodium salt on non-Newtonian behaviors of PVP K90 aqueous solutions, to design a simple viscometer for pseudoplastic fluids, and to develop a viscometer equation suitable for the viscometer in determining fluid consistency index and flow behavior index of PVP K90 aqueous solutions. Non-Newtonian characteristics of PVP K90 aqueous solutions are extensively investigated in terms of the additive amounts such as ethanol, CMC sodium salt, sucrose, and CMC sodium salt with the viscometer and its viscosity equation. Water is used as a reference/calibration liquid for the viscometer.