1. Department of Polymer Engineering, University of Bayreuth, Universitätsstrasse 30, 95447 Bayreuth, Germany,
2. Department of Polymer Engineering, University of Bayreuth, Universitätsstrasse 30, 95447 Bayreuth, Germany
3. Department of Macromolecular Chemistry ll, University of Bayreuth, Universitätsstrasse 30, 95447 Bayreuth, Germany