Measuring the viscoelastic behavior of dilute polymer solutions using high-speed statistical particle microrheology

The viscoelastic behavior of polymer solutions is commonly measured using oscillating shear rheometry, however, the accuracy such methods limited by frequency equipment and since relaxation time dilute short, this requires measurement at very high frequencies. Microrheology has been proposed to overcome technical challenge. Yet for resolving statistics particle displacements in microrheology expensive. In work, we Methocel various concentrations a conventional epi-fluorescence microscope coupled high-speed intensified camera. Statistical Particle Tracking used analyzing mean-squared displacement dispersive particles. Relaxation times ranging from 0.76 – 9.00 ms moduli, G ′ between 11.34 3.39 are reported 0.063 0.5%.