1. Plastics Engineering, University of Wisconsin—Stout, Menomonie, Wisconsin 54751
2. Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55454
3. Total Research and Technology Feluy, Zone Industrielle Feluy C, 7181 Seneffe, Belgium
4. Total American Services, Inc., 1201 Louisiana Street, Suite 1800, Houston, Texas 77002