1. Dept. of Chemical Engineering and Technical Chemistry, Laboratory for Chemical TechnologyGhent UniversityTechnologiepark 914Zwijnaarde (Ghent)B‐9052 Belgium
2. Dept. of Polymer Processing and EngineeringBASF SELudwigshafenD‐67056 Germany
3. Dept. of Technical Chemistry, Inst. for Polymer Material and Process, University of PaderbornOrtsstrasse 135D‐69488Birkenau Germany
4. Dept. of TextilesGhent UniversityTechnologiepark 907Zwijnaarde (Ghent)B‐9052 Belgium