1. Institute of Macromolecular Chemistry of National Academy of Sciences of Ukraine, Kharkivske shose 48, 02160 Kyiv, Ukraine
2. Laboratoire des Matériaux Macromoleculaires, Institut National des Sciences Appliquées de Lyon. Bât. 403, Avenue Albert Einstein 20, 69621 Villeurbanne Cedex, France
3. Department of Mechanical Engineering, Texas A & M University, College Station, TX 77843-3123, USA