Polymer extrudate swell is a rheological phenomenon taking place after polymer melt flow
emerges the die exit of extrusion equipment, due to flow redistributions and molecular stress …

The damping function has been a concept introduced in rheology since more than 30 years
ago, and although a similar concept was already earlier implemented in studying rubber …

In an earlier book, Rheological Measurement (AA Collyer & DW Clegg, Elsevier Applied
Science, 1988), the basic rheological methods of measurement presently used were …

The melt rheology of linear poly (lactic acid) s (PLA) characterized by a high content of the l-
form of the monomer is comprehensively investigated. Measurements of dynamic, steady …

A recent constitutive equation derived from molecular considerations on a model
architecture containing two branch points a “pom-pom” captures the qualitative rheological …

Abstract By generalizing the Doi-Edwards model to the Molecular Stress Function theory of
Wagner and Schaeffer, the extensional viscosities of polyolefin melts in uniaxial, equibiaxial …

The molecular stress function theory for polymer melts is extended to include a new,
dissipative convective constraint release process. First the Helmholtz free energy of tube …

Lodge's rubberlike-liquid theory is a valid description of material behaviour at small strains.
Unfortunately, it fails in the nonlinear region, ie at higher strains. In shear flows, the …

The molecular theory of Doiand Edwards on viscoelasticity of polymer concentrates was
tested on the basis of stress-relaxation data for polystyrene solutions. At relatively low …

Starting from the idea of equilibration, ie, assuming that all molecular tensions are evenly
distributed onto short and long chains in polydisperse polymer melts, we derive a general …