Polymer melts with long-chain side branches and more than one junction point, such as
commercial low density polyethylene (LDPE), have extensional rheology characterized by …

The physics above and below the yield stress is unified by a simple model for viscoplasticity
that accounts for the nonlinear rheology of multiple yield stress fluids. The model has a rate …

Transient and steady‐state recoverable strains in shear and uniaxial elongation were
measured with rheometers of different type. Results on melts of linear and branched …

A stiffened and automated Weissenberg rheogoniometer has been used to measure time‐
dependent nonlinear properties of several polymer solutions in simple shear flow …

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 …

Integrating latest research results and characterization techniques, this book helps readers
understand and apply fundamental principles in nonlinear polymer rheology. The author …

The uniaxial elongational flow data of a well-characterized LDPE melt as measured by
Meissner, and Laun and Münstedt are analysed in terms of a single integral constitutive …

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 …