1. Max Planck Institute
for Polymer Research, Ackermannweg
10, 55128 Mainz, Germany
2. Polymer
Technology and Engineering Division, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
3. Institute
of Physics, Poznan University of Technology, Nieszawska 13A, 60-965 Poznan, Poland