During industrial processing, such as film blowing and injection molding, semicrystalline
polymers have to be subjected to external flow. Flow changes the nucleation rate, crystal …

To optimize automation for polymer processing, attempts have been made to simulate the
flow of entangled polymers. In industry, fluid dynamics simulations with phenomenological …

Three-dimensional (3D) printing is rapidly becoming an effective means of prototyping and
creating custom consumer goods. The most common method for printing a polymer melt is …

Steady-state shear viscosity η (γ̇) of unconcatenated ring polymer melts as a function of the
shear rate γ̇ is studied by a combination of experiments, simulations, and theory …

Understanding the nonequilibrium dynamics of topologically entangled polymers under
strong external deformation has been a grand challenge in polymer science for more than …

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 …

Plastic deformation of the stack of alternating crystal and amorphous layers typical of
semicrystalline polyethylene is studied by molecular dynamics simulation. A previous …

Addition of nanoparticles into a polymer matrix can significantly alter its structure, dynamics
as well as viscosity. In this paper, we study the structural, dynamical and viscous behaviors …

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

We simulate and theoretically analyze the properties of entangled polymer melts confined in
thin film and cylindrical geometries. Macromolecular-scale conformational changes are …