An interlaboratory comparison of measurements from filament-stretching rheometers using common test fluids

By S. Anna, G. H. McKinley, D. Nguyen, T. Sridhar, S. Muller, Jin Huang, D. F. James. 2001

171 citations recorded by the source corpus.

Following development of a filament-stretching extensional rheometer at Monash University, similar rheometers have been designed and built in other laboratories. To help validate the basic technique, a collaborative program was undertaken to compare results from several instruments. First, three test fluids prepared at the University of California at Berkeley were characterized in steady and transient shear flows there and at the Massachusetts Institute of Technology (M.I.T.), and then tested in extensional rheometers at M.I.T., Monash and the University of Toronto. Each fluid is a constant-viscosity solution of narrow-molecular-weight-distribution polystyrene dissolved in oligomeric polystyrene. The solute molecular weights are 2.0, 6.5, and 20 million g/mol, and the polymer concentration in each fluid is 0.05 wt. %. From linear viscoelastic measurements, the Zimm relaxation times of the fluids are found to be 3.7, 31, and 150 s, respectively. The scaling of relaxation times with molecular weight indicat...

Subfields: Fluid Flow and Transfer Processes, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/7c60d2d4b8519f630698cc6011e84f0a25909613

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Citations in the corpus

Electrospinning of Technical Lignins for the Production of Fibrous Networks (2010, background): “[ 44 – 46 ] Furthermore, it is known that real material responses to shear can be different than the responses to extension.”
FILAMENT-STRETCHING RHEOMETRY OF COMPLEX FLUIDS (2002, methodology): “Anna et al. (2001) present a detailed discussion of this gravitational sagging and show that it becomes significant when capillary forces in the neck near the axial midplane are no longer able to overcome the axial body force.”
Measuring the transient extensional rheology of polyethylene melts using the SER universal testing platform (2005, methodology): “More recent inter-laboratory comparisons using a series of well-characterized dilute polystyrene solutions and a common design of filament stretching rheometer, have shown very good agreement [Anna et al. 2001].”
Microdevices for extensional rheometry of low viscosity elastic liquids: a review (2013, methodology): “In just one decade it matured to such an extent that in 2001 it was already considered as an accurate method for characterizing the response of viscoelastic fluids and, in particular, of viscous dilute polymer solutions, almost achieving an ideal uniaxial extensional deformation (Anna et al. 2001).”
The beads-on-string structure of viscoelastic threads (2003, background): “The shear and extensional rheology of this ideal elastic fluid was also studied in detail in Anna et al. (2001), in which it was identified by the acronym ‘SM1’.”
Extensional rheology of a shear-thickening cornstarch and water suspension (2010, methodology): “A complete description of the design and operating space of the filament-stretching rheometer used in these experiments can be found in Rothstein (2003) and Rothstein and McKinley (2002a, b) and a more detailed history of the technique can be found in the papers by the McKinley and Sridhar groups (A”
Elasto-capillary thinning and breakup of model elastic liquids (2001, unknown): “015 ͓Anna et al. ͑2001͔͒.”
The axisymmetric contraction-expansion: the role of extensional rheology on vortex growth dynamics and the enhanced pressure drop (2001, background): “Until quite recently, reliable measurements of the extensional stress of dilute polymer solutions undergoing ideal uniaxial extension were not possible, but with the advent of the filament stretching rheometer, transient uniaxial extensional rheology measurements are now attainable [19], making it p”