1. University of Twente, Faculty of Engineering Technology, Department of Mechanics of Solids, Surfaces & Systems (MS3), Chair of Elastomer Technology and Engineering, P.O. Box 217, 7500 Enschede, The Netherlands
2. Department of Chemical Engineering, Delft University of Technology, 2629 HZ Delft, The Netherlands
3. VTT Technical Research Centre of Finland Ltd, P.O. Box 1001, FI-33014 Tampere, Finland