1. a Center for Basic and Applied Polymer Research , University of Dayton , Dayton, Ohio, 45469
2. b Owens Corning Fiberglass Co. , Technical Center Granville , Ohio, 43023
3. c B. F. Goodrich Co. , Development Center Avon Lake , Ohio, 44012
4. d Department of Materials and Science and Metallurgical Engineering , University of Cincinnati , Cincinnati, Ohio, 45221