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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. T H E U N I V E R S I T Y O F A K R O N 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 B laser lac A CCD CCD XY W transparent film 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).