Solid-state radical grafting reaction of glycidyl methacrylate and poly(4-methyl-1-pentene) in supercritical carbon dioxide: Surface morphology and adhesion

► Solid-state radical grafting of glycidyl methacrylate (GMA) onto poly(4-methyl-1-pentene) (PMP) was performed using supercritical carbon dioxide (scCO2) impregnation technology. ► The grafting degree of the samples may be controlled by time, temperature, and pressure of impregnation. ► Better graft response was obtained for pressure of 130 bar, temperature of 70 °C and time of 7 h. ► Adhesion characteristics of polymer films are dependent on grafting degree of GMA.