1. N.S. Enikolopov Institute of Synthetic Polymer Materials of the Russian Academy of Sciences, Profsoyuznaya Street 70, Moscow 117393, Russia, H. C. Starck GmbH, Research Electronic Chemicals, Central Research and Development Division, Bayerwerk B202, 51368 Leverkusen, Germany, German Wool Research Institute in RWTH Aachen e.V., Pauwelsstrasse 8, D-52074, Aachen, Germany, and Philips Research Laboratories, Prof. Holstlaan 4, 5656 AA Eindhoven, Netherlands