Calculation of the values of the constants of Pelofsky’s equation and comparison with their practical values for certain polymer solutions

Abstract

This study investigates the applicability of Pelofsky's equation to nine polymer aqueous solutions, including Carboxymethyl cellulose, Polyanionic cellulose, Polyacrylamide, Polyvinylalcohol, Polyvinylpyrrolidone, and polyethylene glycol with varying molecular weights. The viscosity and surface tension of these solutions were experimentally determined. The constants A and B of Pelofsky's equation were calculated, but the predicted values did not match the experimental results obtained from the slope of the Ln(ɣ) graph. This discrepancy is attributed to the empirical nature of the equation. Future research can explore the applicability of Pelofsky's equation to a broader range of polymer solutions and examine its compatibility with the relationship between viscosity and surface tension