1. Department of Chemistry, University of Hamburg, Bundesstr. 45, D-20146 Hamburg,
Germany
2. Polymer Consult Ltd., Dorfgrund 6, D-22397 Hamburg, Germany
3. BASF Polyurethanes GmbH, Elastogranstr. 60, 49448 Lemförde, Germany
4. HASYLAB at DESY, Notkestr. 85, D-22603 Hamburg, Germany