Faculty DirectoryStephen Carr
Professor of Materials Science and Engineering
Professor of Chemical and Biological Engineering
Contact2145 Sheridan Road
Evanston, IL 60208
Email Stephen Carr
Ph.D. Polymer Science, Case Western Reserve University, Cleveland, OH
M.S. Polymer Science, Case Western Reserve University, Cleveland, OH
B.S. Chemical Engineering, University of Cincinnati, Cincinnati, OH
Our emphasis is on showing how new polymeric materials can be created by selective control over preparation conditions and microstructure at both the molecular and supramolecular levels.
One project involves creating thermosetting resins with superior properties. These improvements include graded properties and anomalously high values of toughness or hardness. Microstructure, both that if the macromolecular network and that of dispersed phases (size ranging from tens of nanometers to tens of micrometers), is controlled through the chemical formulation of the system and the cure cycle employed. Dispersed phases of interest range from nanocrystalline minerals to elastomeric polymers that are soluble in the initial resin system. Macromolecular networks are varied by control over the distribution of chain segments between junction points; this is accomplished either through the reactive species used or the chosen sequence for vitrefication and gelation.
Another project focuses on the self-compatibilization of a multicomponent polymer mix that can be accomplished by the "solid state shear pulverization" process. This process uses a twin screw extruder operated so as to avoid fusion of the in-process material. One benefit of this process lies in making high value-added alloys from postconsumer recycled plastics. The key to optimizing this process is control over the mechano-chemistry and the dispersion of constituents occurring during passage through the equipment.
- Outstanding Alumni Achievement Award, University of Cincinnati, 1993
- Fellow, American Physical Society, 1983; American Society for Metals (ASM), 1992
- Ralph A. Teetor Award from the Society of Automotive Engineers as an outstanding engineering educator, 1980