Rheological behavior of polymeric liquids has been considered to be universally determined
by a few time-independent molecular parameters (such as the Rouse relaxation time and …

We review constitutive modeling of solutions and melts of linear polymers, focusing on
changes in rheological behavior in shear and extensional flow as the concentration …

We investigate the nonlinear shear and uniaxial extensional rheology of entangled
polystyrene (PS) melts and solutions having the same number Z of entanglements, hence …

We provide a Perspective on recent findings in extensional rheology for polymer melts and
solutions with different macromolecular architectures. For linear polymer systems, we focus …

In the melt state at equilibrium, entangled nonconcatenated ring macromolecules adapt
more compact conformations compared to their linear analogs and do not form an …

We report on recent progress in our understanding of the rheological behavior of polymer
melts, resulting from the work of several investigators, mostly on fast extensional flows. They …

Nonlinear extensional flows are common in polymer processing, but they remain
challenging theoretically because dramatic stretching of chains deforms the entanglement …

Since its inception, the tube model of polymer dynamics has undergone several
modifications to account for observed experimental trends. One trend that has yet to be …

Molecular dynamics simulations are used to study relaxation of entangled polymer melts
deformed far from equilibrium by uniaxial extensional flow. Melts are elongated to a Hencky …

Nonlinear rheological behavior under uniaxial elongation was examined for unentangled
melts of polystyrene (PS27; molecular weight M= 27k) and poly (p-tert-butylstyrene)(PtBS53; …