Production by In Situ Polymerization and Properties of Composite Materials Based on Polypropylene and Hybrid Carbon Nanofillers

Composites based on polypropylene and binary fillers (graphene particles together with carbon nanotubes) are synthesized by in situ polymerization with the use of a homogeneous isospecific metallocene catalyst rac-Me2Si(2-Me-4-PhInd)2ZrCl2 activated by methylaluminoxane. The application of binary carbon nanofillers allows one to enhance thermal stability and thermo-oxidative resistance of materials and to decrease the percolation threshold. It is shown that a close level of conductivity is achieved in the case of a binary filler at a significantly lower concentration. The resulting polymer composites can be applied as antistatic materials, shields and filters of electromagnetic radiation of the corresponding range, and semiconducting layers in power cables.