| 초록 |
Polymeric nanocomposites have been extensively studied for their enormous potential applications in industrial fields. Most of the previous research materials which were used as the fillers in polymer nanocomposites include glass fiber, clay, carbon nanotubes, etc. They each possess their own outstanding properties which are very applicable in specific fields. Recently, however, graphene, a two-dimensional new allotrope of carbon, has attracted considerable interest because of its remarkable mechanical, electrical, thermal and optical properties. However, in many cases, graphene is not compatible with polymers. Functionalization of graphene is a way for improvement of the compatibility with polymers. The investigations focusing on the reinforcement of non-polar polymers by graphene however are very limited. This might be because creating the covalent bonds between graphene and non-polar polymers were difficult and aggregation between graphene sheets in the polymer matrix when electrostatic or steric protections on the graphene sheet were not applied. In this paper, we are reporting a method for grafting polypropylene (PP) on graphene to use graphene as a well-dispersible filler for compounding with virgin PP. The morphology, thermal stability, crystallization behavior and mechanical properties of the compounded nanocomposites were examined and compared with those of virgin PP. |
