Introducing garphene nanoribbons (GNRs), as fillers into polymeric matrix leads to improved properties such as mechanical and electrical as compared with the parent carbon nanotubes. This is a consequence of higher interfacial area; hence better adhesion of unzipped nanotubes with the polymer chains. Furthermore, substitution of carbon atoms with other atoms as dopants is an efficient method to improve the properties of GNR. Particularly, nitrogen doping is known as the most efficient treatment for electrical performance of the nanocomposite. On the other hand, fluoroelastomers (FKM) are attractive materials for wide range of applications due to excellent thermal, chemical, flame ad swelling resistance. In this work, undoped and nitrogen doped GNRs have been synthesized from the parent multiwall carbon nanotubes via a chemical route using potassium permanganate and some second acids. Fluoroelastomer (FKM)/GNR nanocomposites have been also prepared using a solution mixing strategy. The tensile, electrical and dielectric properties of the nanocomposite samples are then studied based on the well-established standard techniques. The microstructural features of the samples are also characterized using high resolution transmission electron microscopy and scanning electron microscopy methods.