Wall slip of molten polymers

SG Hatzikiriakos - Progress in Polymer Science, 2012 - Elsevier
There is considerable experimental evidence that the classical no-slip boundary condition of
fluid mechanics is not always a valid assumption for the flow of high molecular weight …

Molecular transitions and dynamics at polymer/wall interfaces: origins of flow instabilities and wall slip

SQ Wang - Polymers in confined environments, 1999 - Springer
This article reviews recent results on capillary melt flow anomalies. Long standing
controversies and debates in this field are illustrated by summarizing previous results and …

Slip mechanisms in complex fluid flows

SG Hatzikiriakos - Soft Matter, 2015 - pubs.rsc.org
The classical no-slip boundary condition of fluid mechanics is not always a valid assumption
for the flow of several classes of complex fluids including polymer melts, their blends …

Gelation behaviour of konjac glucomannan with different molecular weights

H Zhang, M Yoshimura, K Nishinari… - Biopolymers …, 2001 - Wiley Online Library
The deacetylation and gelation of konjac glucomannan (KGM) following alkali addition was
investigated by Fourier transform infrared, while the rheological properties of KGM with …

Slip in entangled polymer melts. 1. General features

V Mhetar, LA Archer - Macromolecules, 1998 - ACS Publications
Apparent violations of the no-slip boundary condition are studied using a series of narrow
molecular-weight distribution polybutadiene melts (67300≤ M̄ n≤ 650000), subjected to …

Exploring molecular origins of sharkskin, partial slip, and slope change in flow curves of linear low density polyethylene

SQ Wang, PA Drda, YW Inn - Journal of Rheology, 1996 - pubs.aip.org
This paper explores the molecular mechanism for sharkskin formation on extrudate of linear
low density polyethylenes (LLDPE) and investigates the rheological origin of a characteristic …

Stick and slip phenomena during extrusion of polyethylene melts as investigated by laser-Doppler velocimetry

H Münstedt, M Schmidt, E Wassner - Journal of Rheology, 2000 - pubs.aip.org
The flow behavior of polyethylene melts in a slit die was investigated using laser-Doppler
velocimetry. Two polyethylenes, a linear and a long-chain branched sample, were …

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 …

Additive layer manufacturing of semi-hard model cheese: Effect of calcium levels on thermo-rheological properties and shear behavior

C Kern, J Weiss, J Hinrichs - Journal of food engineering, 2018 - Elsevier
Additive layer manufacturing (ALM) is an emerging technology for production of complex
three-dimensional objects in the food sector. In this study, semi-hard model cheeses with …

Wall slip and extrudate distortion of three polymer melts

DM Kalyon, H Gevgilili - Journal of Rheology, 2003 - pubs.aip.org
A high-density polyethylene (HDPE), a poly (dimethylsiloxane)(PDMS), and an oxetane
based alternating block thermoplastic elastomer (TPE) were subjected to steady torsional …