Homogeneous shear, wall slip, and shear banding of entangled polymeric liquids in simple-shear rheometry: A roadmap of nonlinear rheology

SQ Wang, S Ravindranath, PE Boukany - Macromolecules, 2011 - ACS Publications
The recent particle-tracking velocimetric (PTV) observations revealed that well-entangled
polymer solutions and melts tend to either exhibit wall slip or assume an inhomogeneous …

Linear and nonlinear shear rheology of a marginally entangled ring polymer

ZC Yan, S Costanzo, Y Jeong, T Chang… - …, 2016 - ACS Publications
We present systematic, unique linear and nonlinear shear rheology data of an
experimentally pure ring polystyrene and its linear precursor. This polymer was synthesized …

Triggers and signatures of shear banding in steady and time-dependent flows

SM Fielding - Journal of Rheology, 2016 - pubs.aip.org
This précis is aimed as a practical field guide to situations in which shear banding might be
expected in complex fluids subject to an applied shear flow. Separately for several of the …

Shear banding in time-dependent flows of polymers and wormlike micelles

RL Moorcroft, SM Fielding - Journal of Rheology, 2014 - pubs.aip.org
We study theoretically the formation of shear bands in time-dependent flows of polymeric
and wormlike micellar surfactant fluids, focussing on the protocols of step shear stress, step …

[HTML][HTML] Perspective on edge fracture

ST Chan, S Varchanis, SJ Haward, AQ Shen - Journal of Rheology, 2023 - pubs.aip.org
Edge fracture is a viscoelastic instability characterized by the sudden indentation of a fluid's
free surface when the fluid is subjected to a high enough shear rate. During shear …

Viscoelasticity, nonlinear shear start-up, and relaxation of entangled star polymers

F Snijkers, K Ratkanthwar, D Vlassopoulos… - …, 2013 - ACS Publications
We report on a detailed rheological investigation of well-defined symmetric entangled
polymer stars of low functionality with varying number of arms, molar mass of the arms, and …

Sufficiently entangled polymers do show shear strain localization at high enough Weissenberg numbers

SQ Wang, G Liu, S Cheng, PE Boukany, Y Wang… - Journal of …, 2014 - pubs.aip.org
This Letter concludes that the recent data of Li et al.[J. Rheol. 57, 1411–1428 (2013)] are
entirely consistent with the previous observations of the occurrence and absence of shear …

Response of elastoviscoplastic materials to large amplitude oscillatory shear flow in the parallel-plate and cylindrical-Couette geometries

JJ Stickel, JS Knutsen, MW Liberatore - Journal of Rheology, 2013 - pubs.aip.org
Most investigations of large amplitude oscillatory shear (LAOS) rheometry to date have
presumed uniform shear. The study of structured materials would especially benefit from …

Start-up and relaxation of well-characterized comb polymers in simple shear

F Snijkers, D Vlassopoulos, H Lee, J Yang… - Journal of …, 2013 - pubs.aip.org
We report on the shear flow start-up and the relaxation upon flow cessation of anionically
synthesized comb polymers of different chemistries. The experimental data, obtained with a …

Shear inhomogeneity in poly (ethylene oxide) melts

Y Fang, G Wang, N Tian, X Wang, X Zhu, P Lin… - Journal of …, 2011 - pubs.aip.org
The nonlinear rheological behavior of entangled poly (ethylene oxide)(PEO) melts was
studied by particle-tracking velocimetry (PTV) technique in a cone-plate geometry. In the …