Relaxation time of dilute polymer solutions: A microfluidic approach

摘要: Polymer solutions are considered dilute when polymer chains in a solution do not interact with each other. One important step the characterization of these systems is measurement their longest relaxation times λ . For low-viscous solvents, this can be very challenging through conventional techniques. Recently, several microfluidic platforms have been successfully employed to measure rheological properties weakly viscoelastic solutions. Nevertheless, comparison between data generated from different has yet presented. In work, we for concentrations down few parts per million, by using two distinct shear and extensional flow configurations. We consider three representative classes: Neutral polymers near-theta good biological polyelectrolyte solvent presence salt. Relaxation ...