[1] Univ Lyon, Inst Chim Lyon, UMR CNRS C2P2 5265, 43 Blvd 11 Novembre 1918, F-69616 Villeurbanne, France
[2] Politecn Milan, Dept Chem Mat & Chem Engn G Natta, Piazza L da Vinci 32, I-20133 Milan, Italy
[3] Univ Clermont Auvergne, Inst Chim Clermont Ferrand, CNRS, 24 Ave Blaise Pascal, F-63178 Aubiere, France
[4] CEA Liten, 17 Rue Martyrs, F-38054 Grenoble 9, France