1. Department
of Chemical Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
2. Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
3. LANXESS Elastomers B. V., Research & Development, P.O. Box 1130, 6160 BC Geleen, The Netherlands