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DR. SHI-QING WANG
Kumho Professor of Polymer Science
Polymer Physics and Engineering: dynamics, rheology and
mechanics of polymer liquids and glasses
Research Interests:
Physics and engineering of polymeric and other structured
materials: Rheology, processing, mechanical performance
of polymers and polymer composites, nonlinear viscoelastic
behaviors of polymers in both liquid and glassy states.
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Department of
Polymer Science
The University of Akron, OH
44325 330-972-7108
[email protected]
www.uakron.edu/rheology/
Biography: Shi-Qing Wang, a world leader in
polymer rheology and mechanics, came to UA
in 2000 after serving 11 years on the faculty in
the Department of Macromolecular Science and
Engineering at Case Western Reserve
University. He joined CWUR in October 1989
after receiving a Ph.D. in physics from
University of Chicago in 1987, and rose to the
rank of full professorship in 1998 while
developing a research style to internalize
experimental and theoretical activities. At UA,
Wang has built a unique research program that
resulted in a paradigm shift in the field of
nonlinear rheology of entangled polymers and a
book – Physics of Nonlinear Polymer Rheology
(Wiley, 2015). The more recent adventure of
his research group has explored a working
theoretical framework for mechanical behavior
of polymer glasses that could guide us in new
molecular design of stronger polymer materials.
Awards/Accomplishments:
•
Fellow of American Physical Society (1997)
•
Outstanding researcher award of the University
of Akron (2010)
•
Kumho Professorship (2011- )
•
Fellow of American Association for the
Advancement of Science (AAAS) (2014)
Research capabilities relevant to industrial practice
We have build a new conceptual and phenomenological
foundation for polymer rheology that offers a fresh look at
how to overcome various difficulties encountered in
industrial processing of different polymeric materials
ranging from thermo-plastics (e.g., polyethylene,
polypropylene) to rubbers (e.g., polybutadiene,
polyisoprene, SBR).
We have also established a new molecular model to provide
a simplest account for deformation, yielding and failure, and
the origin of mechanical strength of polymer glasses.
Research shows that the brittle behavior of polymer glasses
results from lack of sufficient chain networking, leading to
chain pullout, not from chain scission. The ductility of
polymer glasses is determined by chain microstructure,
which in turn dictates the density of chain networking and
the degree of vitrification of the glassy state. The new
understanding has profound implications for the polymer
industry.
objective lens
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PTV setup
Molecular model for polymer glasses
Unique Laboratory Setups:
Particle-tracking velocimetry (PTV) is a patented method to
enable a realistic characterization of rheological behavior of
a variety of polymeric materials. Few labs in the world are
equipped with such an important component/addition to
rheometric characterization of polymers.
Selected Publications/Patents:
1. "Homogeneous shear, wall slip and shear banding of
entangled polymeric liquids in simple-shear rheometry:
a roadmap of nonlinear rheology", Perspective,
Macromolecules 44, 183 (2011).
2. "A phenomenological molecular model for yielding and
brittle-ductile transition of polymer glasses", J. Chem.
Phys. 141, 094905 (2014).
3. "Nonlinear rheology of entangled polymers at turning
point", Opinion, Soft Matter, DOI: 11, 1454 (2015).