1. Department of Mechanical and Industrial Engineering University of Toronto Toronto Ontario M5S 3G8 Canada
2. University of Connecticut Institute of Materials Science Storrs CT 06269 U.S.A.
3. Department of Chemistry University of Toronto Toronto Ontario M5S 3H6 Canada
4. School of Mechanical, Aerospace, and Manufacturing Engineering University of Connecticut Storrs CT 06269 U.S.A.
5. Inorganic Polymers Department Petru Poni Institute of Macromolecular Chemistry Iasi 700487 Romania