1. Department of Materials Science, Center of Engineering Science; Martin-Luther University Halle-Wittenberg; Haale/Saale D-06099 Germany
2. Chemistry Department, Physical Chemistry of Polymers; Martin-Luther-University Halle-Wittenberg; D-06120 Halle/Saale Germany
3. Department of Engineering; University of Applied Science Hof; Faculty of Engineering; Alfons-Goppel-Platz 1 D-95028 Hof Germany
4. Business Unit Biological and Macromolecular Materials; Fraunhofer Institute for Mechanics of Materials IWM; D-06120 Halle (Saale) Germany