Abstract: The advantages and disadvantages of several strategies in preparing exfoliated graphite, including physical methods (micromechanical cleavage, direct exfoliation) and chemical methods (chemical vapor deposition, epitaxial growth, unzipping carbon nanotubes, reduced of graphite oxide), are reviewed. Various methods for dispersing graphene into polypropylene (PP) are also summarized. Special emphasis is putted on the effect of graphene on the electrical, mechanical, thermal, crystallization and rheological properties of PP nanocomposites prepared by different methods. Existing problems and challenges for PP/graphene nanocomposites are also concerned.

Key words: graphene, polypropylene nanocomposite, preparation, property