Rheological Characterization of Polymer Solution: Assessing Linear Viscoelasticity and Frequency Dependence

Oscillatory strain investigations were performed on a 1% w/v polymer solution at a controlled temperature of 25ﾰC. A strain range spanning from 0.01% to 1000% at a constant frequency of 1 Hz was employed. The resulting modulus-strain relationship was then examined to delineate the linear viscoelastic regime of the polymer solution. Subsequently, a frequency sweep, encompassing an angular frequency spectrum from 0.1 rad/s to 100 rad/s, was executed at a fixed strain of 2%. This facilitated the determination of the elastic and viscous moduli as functions of angular frequency.