Graduate Seminar Announcement - Dr. Alan Lesser
Purdue University School of Chemical Engineering Graduate seminar series Prof. Alan Lesser University of Massachusetts "Aspects of molecular mobility and topology on the mechanical performance of polymeric glasses" October 15, 2013 9:00-10:15 a.m. FRNY G140 Reception at 8:30 a.m. in Henson Atrium Abstract: The use of polymeric materials is widespread in virtually every application within our society today. They are now commonplace engineering materials of choice in many applications including, automotive, aerospace, housing, and medical applications. This is due in large part to the multitude of synthetic routes, molecular architectures, and processing strategies that enable an infinite range of materials with unique properties. In this lecture, we discuss aspects that relate molecular architecture and segmental mobility to engineering performance. We start by highlighting how basic alterations in molecular architecture affect key thermal and mechanical properties of glassy networks. We then discuss how these characteristics relate to nonlinear properties including the yield behavior, the post yield response, and fracture behavior. We illustrate how these properties change during the formation of the glass and how they are altered by process or cure conditions. We then present results that probe segmental mobility during active nonlinear deformation in a model glass. We distinguish between flow in a polymer melt to that of vitreous flow observed in polymer glass subjected to large inelastic deformation. Bio: Dr. Alan Lesser is currently a Full Professor in the Polymer Science and Engineering Department at the University of Massachusetts. His research activities include structure-property relationships in polymers and polymer based composites, nonlinear and fracture behavior of polymer based materials, and processing polymers in supercritical carbon dioxide. He is currently Editor-in-Chief of Polymer Engineering and Science Journal and Polymer Composites Journal. He also resides on the Advisory Board for the Journal of Applied Polymer Science. He is a Fellow of the Society of Plastics Engineers, has served as the Conference Chair for the Gordon Composites Conference, and has served as Chair of the Polymer Analysis Division, and Failure Analysis and Prevention SIG, for the Society of Plastics Engineers. He has published more than 100 papers in refereed journals and more than 130 in conference proceedings. Dr. Lesser received his PhD in Civil Engineering from Case Western Reserve University in 1988 and joined the faculty in the PSE Department in 1995 after spending 6 years in industry working as a Research Scientist for Shell Development Company.
Purdue University School of Chemical Engineering Graduate seminar series Prof. Richard Braatz Massachusetts Institute of Technology "Systems Nanotechnology: Engineering Nanomaterials for Chemical, Pharmaceutical, and Biological Applications" October 29, 2013 9:00-10:15 a.m. FRNY G140 Reception at 8:30 a.m. in Henson Atrium Abstract: Nanometer length scale analogues of most traditional control elements, such as sensors, actuators, and feedback controllers, have been enabled by recent advancements in device manufacturing and fundamental materials research. However, combining these new control elements in classical systems frameworks remains elusive. Methods to address the new generation of systems issues particular to nanoscale systems is termed here as systems nanotechnology. This presentation discusses some promising design and control strategies that have been developed to address the challenges that arise in systems nanotechnology. A selection of novel nanoscale devices are reviewed, selected by their potential for broad application in nanoscale systems. Many of these devices utilize single-walled carbon nanotubes, which demonstrate the diversity of potential applications for a single type of nanoscale material. All of the elements necessary for the design and control of nanoscale systems are available, including chemical/biosensors to rapidly assess the physicochemical characteristics and use for estimation of the states of a system, actuators to affect the system states, and feedback controllers to utilize the state estimates to determine the signals to send to the actuators to satisfy control objectives. Specific examples are provided where the estimation, design, and control of complex nanoscale systems have been demonstrated in experimental implementations or in high-fidelity simulations. The presentation ends with a discussion of some open research questions in systems nanotechnology. Bio: Richard D. Braatz<http://web.mit.edu/braatzgroup/> is the Edwin R. Gilliland Professor at the Massachusetts Institute of Technology (MIT) where he does research in control theory and its application to biomedical systems, pharmaceuticals manufacturing, and nanotechnology. He received MS and PhD degrees from the California Institute of Technology and was a Professor at the University of Illinois at Urbana-Champaign and a Visiting Scholar at Harvard University before moving to MIT. He has collaborated with more than a dozen companies including IBM, United Technologies Corporation, DuPont, BP, Novartis, Pfizer, and Bristol Myers Squibb. Honors include the Donald P. Eckman Award from the American Automatic Control Council, the Curtis W. McGraw Research Award from the Engineering Research Council, the Research Collaboration Award from the Chemical Research Council, the IEEE Control Systems Society Transition to Practice Award, and the AIChE Excellence in Process Development Research Award. He is a Fellow of IEEE, IFAC, and the American Association for the Advancement of Science.
Purdue University School of Chemical Engineering Graduate seminar series Prof. Richard Braatz Massachusetts Institute of Technology "Systems Nanotechnology: Engineering Nanomaterials for Chemical, Pharmaceutical, and Biological Applications" October 29, 2013 9:00-10:15 a.m. FRNY G140 Reception at 8:30 a.m. in Henson Atrium Abstract: Nanometer length scale analogues of most traditional control elements, such as sensors, actuators, and feedback controllers, have been enabled by recent advancements in device manufacturing and fundamental materials research. However, combining these new control elements in classical systems frameworks remains elusive. Methods to address the new generation of systems issues particular to nanoscale systems is termed here as systems nanotechnology. This presentation discusses some promising design and control strategies that have been developed to address the challenges that arise in systems nanotechnology. A selection of novel nanoscale devices are reviewed, selected by their potential for broad application in nanoscale systems. Many of these devices utilize single-walled carbon nanotubes, which demonstrate the diversity of potential applications for a single type of nanoscale material. All of the elements necessary for the design and control of nanoscale systems are available, including chemical/biosensors to rapidly assess the physicochemical characteristics and use for estimation of the states of a system, actuators to affect the system states, and feedback controllers to utilize the state estimates to determine the signals to send to the actuators to satisfy control objectives. Specific examples are provided where the estimation, design, and control of complex nanoscale systems have been demonstrated in experimental implementations or in high-fidelity simulations. The presentation ends with a discussion of some open research questions in systems nanotechnology. Bio: Richard D. Braatz<http://web.mit.edu/braatzgroup/> is the Edwin R. Gilliland Professor at the Massachusetts Institute of Technology (MIT) where he does research in control theory and its application to biomedical systems, pharmaceuticals manufacturing, and nanotechnology. He received MS and PhD degrees from the California Institute of Technology and was a Professor at the University of Illinois at Urbana-Champaign and a Visiting Scholar at Harvard University before moving to MIT. He has collaborated with more than a dozen companies including IBM, United Technologies Corporation, DuPont, BP, Novartis, Pfizer, and Bristol Myers Squibb. Honors include the Donald P. Eckman Award from the American Automatic Control Council, the Curtis W. McGraw Research Award from the Engineering Research Council, the Research Collaboration Award from the Chemical Research Council, the IEEE Control Systems Society Transition to Practice Award, and the AIChE Excellence in Process Development Research Award. He is a Fellow of IEEE, IFAC, and the American Association for the Advancement of Science.
participants (2)
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Eikleberry, Lucinda -
Ewing, Virginia G