1. Department of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
2. Solvay Specialty Polymers, Viale Lombardia, 20, 20021 Bollate, Italy
3. Institute of Sciences and Chemical Technologies “Giulio Natta” (SCITEC) of CNR, via Corti 12, 20133 Milano, Italy