1. a Institute for Polymer Materials and Plastic Processing, Agricolastrasse 6, 38678 Clausthal-Zellerfeld, Germany
2. b Institute for Polymer Materials and Plastic Processing, Agricolastrasse 6, 38678 Clausthal-Zellerfeld, Germany
3. c Institute for Polymer Materials and Plastic Processing, Agricolastrasse 6, 38678 Clausthal-Zellerfeld, Germany