Ozone functionalized graphene nanoplatelets and triblock copolymer hybrids as nanoscale modifiers to enhance the mechanical performance of epoxy adhesives

In the present work, mechanical and fracture performance of a newly developed high-performance nanocomposite adhesive was characterized experimentally. The based on an epoxy resin, which modified with 10 wt% triblock copolymers (BCPs) including styrene-butadiene-methylmethacrylate (SBM) methylmethacrylate-butylacrylate-methylmethacrylate (MAM), ozone-functionalized graphene nanoplatelets (OZ-GNPs). properties joints were systematically evaluated using lap shear, tensile-butt, Mode-I toughness tests. shear strength ultimate strain 1.0 OZ-GNP + SBM ternary adhesives obtained 91% 97%, while MAM attained 64% 63% improvement, respectively, compared to that pure epoxy. Consequently, potential load capacity improved by about 93% (1.0 SBM) 62% MAM) joints. However, tensile butt joint slightly reduced due lower stiffness BCPs. mode-I results for increased significantly approximately 1000% 200%, unmodified adhesive. Fractography scanning electron microscopy showed formation BCP nanostructures, plastic deformation, crack deflection, debonding BCP, subsequent void growth, all contributed increase in adhesives. extent deformation zone enhanced addition OZ-GNPs.