1. Department of Elastomer Technology and Engineering; University of Twente, P.O. Box 217; AE Enschede 7500 The Netherlands
2. Novel Aerospace Materials Group, Faculty of Aerospace Engineering; Delft University of Technology, Kluyverweg 1, 2629 HS Delft; The Netherlands
3. Institute of Polymer Science and Technology (ICTP-CSIC), Juan de la Cierva 3; Madrid 28006 Spain
4. Hansen & Rosenthal KG; Am Sandtorkai 64; Hamburg 20457 Germany