1. IMED-Lab, Faculty of Sciences and Techniques, Cadi-Ayyad University, Marrakech, Morocco;
2. LaMaCoP-Faculty of Sciences, University of Sfax, Sfax, Tunisia;
3. Instituto de Ciencia y Tecnologıa de Polımeros, ICTP-CSIC, Madrid, Spain;
4. CBS-Mohammed VI Polytechnic University, Ben Guerir, Morocco