1. School of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou, 15780 Zografou, Greece
2. Processing and Performance of Materials, Department of Mechanical Engineering, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
3. Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands