Affiliation: | 1. Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz (Germany), Fax: (+49)?6131‐379‐350;2. Present address: Université Francois Rabelais, Laboratoire PCMB, Equipe CIME, Faculté des Sciences et Techniques, Parc de Grandmont, 37200 Tours (France);3. Present address: Evonik Degussa GmbH, Process Technology & Engineering, Process Technology—New Processes, Rodenbacher Chaussee 4, 63457 Hanau (Germany) |