Fig. 5From: Preparation of Ultrahigh Molecular Weight Polyethylene/Graphene Nanocomposite In situ Polymerization via Spherical and Sandwich Structure Graphene/Sio2 Supporta SEM image of BuMgCl/RGO-SiO2, b the corresponding EDX spectrum of BuMgCl/RGO-SiO2, c SEM image of TiCl4/(BuMgCl/RGO-SiO2) catalyst, and d EDS spectrum of TiCl4/(BuMgCl/ RGO-SiO2) at an area indicated with a white line in part cBack to article page