IMPROVED WOODWORKING ADHESIVES BASED ON EMULSION POLYMERIZATION OF POLYVINYL ACETATE

Keisha D. Sopher and Dr. Charles E. Frazier
National Science Foundation Science and Technology Center
High Performance Polymers Adhesives and Composites
Department of Wood Sciences and Forest Products
Virginia Polytechnic Institute and State University
Blacksburg, VA

ABSTRACT

Stable, aqueous emulsions of vinyl-acetate: N-methylolacrylamide copolymers provide excellent adhesive bond strength and water resistance on a high degree. This research was designed to investigate the molecular characteristics that correlate to the overall performance of the adhesive. Through replication of the industrial Emulsion Polymerization of Polyvinyl Acetate process, one is able to conduct an in-depth study of the molecular structure and characteristics of the adhesive using liquid and solid state Nuclear Magnetic Resonance. The Emulsion Polymerization of Polyvinyl Acetate involves the reaction of monomers, vinyl acetate and N-methylolacrylamide, with a free-radical type catalyst, and polyvinyl alcohol as an emulsifying agent. A stable, aqueous emulsion of polyvinyl acetate was replicated using a patent procedure.