Polymer NanoSystems by Co-extrusion Processing: Lessons from Nature

David Wang Auditorium, 3rd floor Dalia Maydan Bldg.
Eric Baer

Eric Baer
Director, Center for Layered Polymeric Systems (CLiPS)
Distinguished University Professor
Herbert Henry Dow Professor of Science and Engineering
Department of Macromolecular Science and Engineering
Case Western Reserve University, Cleveland, OH 44106
Tel: 216-368-4203/Fax: 216-368-6329
Email: exb6@case.edu

In recent years, numerous research advances in the Center for Layered Polymeric Systems (CLiPS), a Science and Technology Center of the U.S. National Science Foundation, have been made in many novel scientific areas. Continuous solventless co-extrusion processing using multiplying dies is currently being used to create both new nanolayer and new nanofiber systems by employing only viscoelastic melts of established state-of-the-art polymeric materials. Specific examples will be discussed that focus on the effects of scale on both the hierarchical structure and properties of these systems. The micro and nano layered examples will includetunable reflectors which are biomimetic copies of butterfly wings; gradient index lenses which are copies of mamalian lenses; novel composite dielectric films for capacitors with enhanced interfacial characteristics; unique shape memory systems processed from continuous micro and nanolayered polymers that are superior to similar block copolymers and co-continuous blends; high barrier layered systems to both oxygen and water for possible use in electronic applications. Lastly, a new highly flexible process for creating unique nanofibers by a related solventless coextrusion methodology will be described with particular emphasis on filters for gaseous and liquid systems.