Abstract

In this study, the graphite/epoxy prepregs were surface-treated using oxygen plasma, and optimal treatment time was determined measuring the contact angle on the prepreg surface. Interlaminar fracture behavior of surface-treated graphite/epoxy composites was compared with that of regular (untreated) graphite/epoxy composites. The results showed that the contact angle was a minimum when treated for 30 minutes. The interlaminar fracture toughness of surface-treated specimen was improved about 15% compared with that of regular specimen.

• Keywords: Contact Angle(접촉각),Energy Release Rate(에너지방출율),Fracture Toughness(파괴인성),Graphite/Epoxy Composites(탄소섬유/에폭시 복합재),Interlaminar Fracture(층간파괴)