1. Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic, and Chemical Faculty, Technical University of Brno, Purkynova 118, 612 00 Brno, Czech Republic
2. Fraunhofer Institute for Applied Polymer Research, Science Campus Golm, Geiselbergstr. 69, D-14476 Potsdam, Germany
3. Institute of Physics, National Academy of Sciences of Ukraine, Prospekt Nauki 46, 252650 Kiev 22, Ukraine