S Costanzo, D Parisi, T Schweizer… - Journal of Rheology, 2024 - pubs.aip.org
High-shear rate rotational rheometry provides access to the fast nonlinear dynamics of soft materials and, particularly, their shear stress (exhibiting shear thinning and/or thickening) as …
In an earlier book, Rheological Measurement (AA Collyer & DW Clegg, Elsevier Applied Science, 1988), the basic rheological methods of measurement presently used were …
CC Hua, JD Schieber - The Journal of chemical physics, 1998 - pubs.aip.org
A self-consistent reptation theory that accounts for chain-tube interactions, segment connectivity, chain-length breathing, segmental stretch, and constraint release is proposed …
Here, the sum is conducted over all the particles in a given macromolecule. Assuming that all the macromolecules are identical, and neglecting the statistical dependence of the …
M Keentok, SC Xue - Rheologica acta, 1999 - Springer
Edge fracture is an instability of cone-plate and parallel plate flows of viscoelastic liquids and suspensions, characterised by the formation of acrack'or indentation at a critical shear …
Many biological fluids have polymeric microstructures and display non-Newtonian rheology. We take advantage of such nonlinear fluid behavior and combine it with geometrical …
Step shear rate experiments in the range of 0.1< ̇ γ< 30s^-1 (0.14< Wi< 42) were performed with a PS 158K melt at 190° C. A cone (gap angle= 0.148 rad) and partitioned …
S Costanzo, G Ianniruberto, G Marrucci… - Rheologica Acta, 2018 - Springer
We propose a simple, robust method to measure both the first and second normal stress differences of polymers, hence obtaining the full set of viscometric material functions in …
T Schweizer, J van Meerveld, HC Öttinger - Journal of rheology, 2004 - pubs.aip.org
Measurements of the shear viscosity and the first and second normal stress coefficients are shown at 175° C for a nearly monodisperse polystyrene melt with M w= 200 kg/mol (PS 200 …