Special MSE Seminar - Dr. John Pojman - LSU
Cure-On Demand Polymerization using Clock Reactions and Propagating Fronts
John A. Pojman, Ph.D.
Department of Chemistry
Louisiana State University
The goal of cure-on-demand polymerization is to create one-pot systems that have a long shelf live but will react rapidly when curing is desired. We use two approaches: coupling polymerizations with clock reactions and an approach called frontal polymerization in which a localized reaction zone propagates from the coupling of thermal transport and the Arrhenius dependence of the reaction rate of an exothermic polymerization. We demonstrate that frontal polymerization can be used to create a cure-on-demand putty for filling holes in wood, marble, and sheet rock. The putty has a months-to-years shelf life, is a one-pot formulation, can be applied leisurely and then cured rapidly with a flat heat source. We also demonstrate frontal polymerization can be used to create an adhesive for wood and plastic-wood composites that cures rapidly and has impressive shear strength. Finally, we will explore current efforts to commercialize “3P QuickCure Clay” for the art market.
Bio: Dr. John A. Pojman, a native of Chippewa Lake, Ohio, received his B. S. in Chemistry (with a minor in Classics) from Georgetown University in 1984. He earned his doctorate in Chemical Physics in 1988 at the University of Texas at Austin. Pojman then worked for two years at Brandeis University with Irving Epstein. In 1990 he joined the Chemistry & Biochemistry department at The University of Southern Mississippi, where he taught for 18 years. Dr. Pojman joined the Department of Chemistry at Louisiana State University in August 2008, where he is Professor of Macromolecular Science.
Pojman has co-authored one monograph, An Introduction to Nonlinear Chemical Dynamics, and co-edited three others. He has served twice as a guest editor for the journal Chaos. He has authored 134 peer-reviewed publications and 10 book chapters. Professor Pojman has made 265 presentations and received two patents.
He is the founder of Polymer Polymer Products, LLC, which manufacturers 3P QuickCure Clay.
Professor Pojman is an expert on nonlinear dynamics in polymer systems and effective interfacial tension between miscible fluids. He is an avid carp fisherman and amateur herpetologist with a special interest in the aquatic salamanders of Louisiana. He also boasts the world largest collection of pocket protectors.