1. Laboratory for Characterization and Processing of Polymers; Faculty of Mechanical Engineering; University of Maribor; Smetanova 17 2000 Maribor Slovenia
2. Institute of Chemistry; University of Graz; Heinrichstrasse 28 Graz 8010 Austria
3. Chair of Chemistry of Polymeric Materials; University of Leoben; Otto-Glöckel-Straße 2 AT-8700 Leoben Austria