1. Institute TMC Department of Chemistry University of Hamburg Bundesstr. 45 D‐20146 Hamburg Germany
2. Leibniz‐Institute for Polymer Research (IPF) Hohe Str. 6 D‐01069 Dresden Germany
3. BASF Polyurethanes GmbH Elastogranstr. 60 D‐49448 Lemförde Germany
4. Deutsches Elektronen‐Synchrotron (DESY) Notkestr. 85 D‐22607 Hamburg Germany