▎ 摘　　要

The effect of functionalized graphene (FG) on the mechanical properties, especially toughness, of nylon12 was investigated. The results revealed that the incorporation of a very small amount (about 0.6 wt%) of the FG caused a significant improvement in ultimate tensile strength, elongation, impact strength and toughness. With 0.6 wt% FG ultimate tensile strength and elongation at break of the nylon 12 are improved by similar to 35% and similar to 200%, respectively. The K-1c of the nylon 12 is similar to 1.28 MPa m(0.5) and the incorporation of 0.6 wt% FG causes a significant increase of 72% (similar to 2.2 MPa m(0.5)). 0.6 wt% FG also causes a significant improvement of 175% in impact failure energy of the nylon 12. The incorporation of FG resulted in an increase in amount of gamma-phase of nylon12 which could be the direct reason for the increase of toughness. (C) 2010 Published by Elsevier Ltd.