a method and apparatus comprising expanded , or flexible , graphite mixed into a polymer material is disclosed . a method for using expanded graphite that has been pre - compressed prior to milling to enable a polymer material to accept an electrostatic modification to the surface or to dissipate electrostatic discharges . other embodiments relate to methods of making polymer materials , methods of making molded polymer articles or objects , and methods of electrostatically modifying molded conductive polymer materials .