1. Department of Chemical Engineering, University of Liège B6A, Allée du Six Août 3, B-4000 Liège, Belgium
2. Polymer Chemistry and Materials, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
3. CARPOR, Department of Chemical Engineering, University of Liège B6A, Allée du Six Août 3, B-4000 Liège, Belgium