Selected publications on nonlinear polymer rheology

Polymer Dynamics, Interfaces and Rheology Group

 http://www3.uakron.edu/rheology/

Summaries

"The tip of iceberg in nonlinear polymer rheology: entangled liquids are 'solids'", S. Q. Wang, J. Polym. Sci. Polym. Phys. Ed. Viewpoint, 46, 2660 (2008).
"A coherent description of nonlinear flow behavior of entangled polymers as related to processing and numerical simulations", S. Q. Wang, Feature Article, Macromol. Mater. Eng, 292, 15 (2007).
"Molecular transitions and dynamics at melt/wall interfaces: origins of flow instabilities and wall slip", S.Q. Wang, Review Article, Adv. Polym. Sci. 138, 227 (1999).
 

Theoretical development

"New theoretical considerations in polymer rheology: elastic breakdown of chain entanglement network", S. Q. Wang, S. Ravindranath, Y. Y. Wang and P. Boukany, J. Chem. Phys. 127, 064903 (2007).
"Yielding during startup deformation of entangled linear polymeric liquids", Y. Y. Wang and S. Q. Wang, J. Rheol., to be published (2009).
 

Universal scaling behavior of yielding upon startup deformation

1.      "Universal scaling characteristics of stress overshoot in startup shear of entangled polymer solutions", S. Ravindranath and S. Q. Wang, J. Rheol. 52, 681 (2008).

2.      "Universal scaling behavior of shear stress overshoot in entangled melts", P. Boukany, and S. Q. Wang, J. Rheol. 53, 617 (2009).

Stick-slip transition and wall slip

"Experimental study of interfacial and constitutive phenomena in fast flow. 1. Interfacial instabilities of monodisperse polybutadiene", X. Yang, H. Ishida and S.Q. Wang, Rheol. Acta 37, 415 (1998).
"Interfacial stick-slip transition in simple shear of entangled melts", P. E. Boukany, P. Tapadia and S. Q. Wang, J. Rheol. 50, 641 (2006).
"Exploring origins of interfacial yielding in entangled linear melts during shear or after shear cessation", P. E. Boukany and S. Q. Wang, Macromolecules 42, 2222 (2009).
 

Step shear and step extension

"Non-quiescent relaxation in entangled polymeric liquids after step strain", S. Q. Wang, S. Ravindranath, P. Boukany, M. Olechnowicz, R. P. Quirk, A. Halasa, J. Mays, Phys. Rev. Lett. 97, 187801 (2006).
"What are the origins of stress relaxation behaviors in step shear entangled polymer solutions", S. Ravindranath and S. Q. Wang, Macromolecules 40, 8031 (2007).
"Elastic breakup in uniaxial extension of entangled polymer melts", Y. Wang, S. Q. Wang, P. Boukany and X. Wang, Phys. Rev. Lett. 99, 237801 (2007).
"Step shear of entangled linear polymer melts: New experimental evidence for elastic yielding", P. E. Boukany and S. Q. Wang, Macromolecules, to be published.
 

Large amplitude oscillatory shear

"Banding in shear oscillation of entangled fluids", P. Tapadia, S. Ravindranath and S. Q. Wang, Phys. Rev. Lett. 96, 196001 (2006).
"Particle-tracking velocimetric investigation of large amplitude oscillatory shear behavior of entangled polymer solutions", S. Ravindranath and S. Q. Wang, J. Rheol. 52, 341 (2008).
"Nonlinearity in large amplitude oscillatory shear (LAOS) of different viscoelastic materials", X. Li, S. Q. Wang and X. Wang, J. Rheol., Sept./Oct. issue (2009).
 

Startup continuous shear

"Yield like constitutive transition in shear flow of entangled polymeric fluids", P. Tapadia and S.Q. Wang, Phys. Rev. Lett. 91, 198301 (2003).
"Nonlinear flow behavior of entangled polymer solutions: yield like entanglement-disentanglement transition", P. Tapadia and S. Q. Wang, Macromolecules 37, 9083 (2004).
"Direct visualization of continuous simple shear in non-Newtonian polymeric fluids", P. Tapadia and S. Q. Wang, Phys. Rev. Lett. 96, 016001 (2006).
"A correlation between velocity profile and molecular weight distribution in sheared entangled polymer solutions ", P. Boukany and S. Q. Wang, J. Rheol. 51, 217 (2007).
"Steady state measurements in stress plateau region of entangled polymer solutions: entanglement-disentanglement transition and beyond", S. Ravindranath and S. Q. Wang, J. Rheol. 52, 957 (2008).
"Banding in simple steady shear of entangled polymer solutions", S. Ravindranath and S. Q. Wang, Macromolecules 41, 2663 (2008).
"Shear banding and wall slip in entangled DNA solutions", P. Boukany, T.Y. Hu and S. Q. Wang, Macromolecules 41, 2644 (2008).
"Particle-tracking velocimetric and flow birefringence studies of nonlinear flow behavior of wormlike entangled micellar solutions", P. Boukany and S. Q. Wang, Macromolecules 41, 1455 (2008).
"Shear banding or not in entangled DNA solutions depending on the level of entanglement", P. E. Boukany and S. Q. Wang, J. Rheol. 53, 73 (2009).
"Exploring the transition from wall slip to bulk shearing banding in well-entangled DNA solutions", P. E. Boukany and S. Q. Wang, Soft Matter 5, 780 (2009).
"Nonlinear rheological behavior of poly(dimethyl siloxane) melt: an example of homogeneous shear", X. Li and S. Q. Wang, Rheol. Acta, to be published (2009).
 

Startup continuous uniaxial extension

"Elastic breakup in uniaxial extension of entangled polymer melts", Y. Wang, S. Q. Wang, P. Boukany and X. Wang, Phys. Rev. Lett. 99, 237801 (2007).
"From elastic extension to elongational flow of entangled melts", Y. Y. Wang and S. Q. Wang, J. Rheol. 52, 1275 (2008).