1. Department of Polymer Engineering University of Bayreuth Universitätsstr. 30 95447 Bayreuth Germany
2. Ivoclar Vivadent AG Bendererstrasse 2 Schaan 9494 Principality of Liechtenstein
3. Department of Physical Chemistry I and Bavarian Polymer Institute (BPI) University of Bayreuth Universitätsstr. 30 95447 Bayreuth Germany