1. Materials Polymer LaboratoryDepartment of Macromolecular ChemistryFaculty of ChemistryUniversity of Sciences and Technologie Houari Boumediene (USTHB)PO BOX 32, El AliaBab‐Ezzouar16111AlgiersAlgeria
2. Department of ChemistryFaculty of SciencesUniversity M'hamed Bougara Boumerdes, UMBBBoumerdes35000Algeria