Toughness and Thermal Properties of MWCNTs/EP Composites

摘要

Multi-walled carbon nanotubes (MWCNTs) were incorporated into epoxy resin (EP) to improve the resin's toughness and thermal properties. MWCNTs/EP composites were prepared by hot melt method. The fracture energy of composites was determined by wedge test, measure length of crack extension of the composites, and calculates the fracture energy. Results show improved composites toughness, as MWCNTs were dispersed in EP matrix evenly, thus absorbed impact energy. Thermal gravimetric analysis (TGA) results suggest that initial decomposition temperature increased by adding MWCNTs, with a promoted formation of a structural antiflaming network, which led to enhancement of thermal stability of the composites. The limiting oxygen index (LOI) and LU-94 data also showed a decrease of flammability of the composites.