Fig. 7From: Preparation of Ultrahigh Molecular Weight Polyethylene/Graphene Nanocomposite In situ Polymerization via Spherical and Sandwich Structure Graphene/Sio2 Supporta UHMWPE/RGO-SiO2 composite powder as obtained after polymerization. b UHMWPE powder without RGO-SiO2. d Histograms of size distribution of c. e SEM images obtained from fracture surface of composites in different magnification. f Surface magnification of eBack to article page