Due to the remarkable properties of graphene oxide (GO) and its possibility of functionalization, GO have been used in many applications, such as nanocomposites. GO nanosheets has been showed to improve the properties of the polypropylene (PP) matrix, for instance, the strength, gas barrier, thermal, and electrical conductivity. Because PP has a relatively low cost and has a lot of different applications, and properties, this work aims to synthesize GO, incorporate in the PP matrix and study the changes in thermal, morphological, and mechanical properties of PP, due to GO incorporation. The GO was synthesized from graphite by a modified Hummer’s method. The nanocomposites PP/GO with 0.1 wt. %, 0.2 wt. % and 0.3 wt. % of GO in the PP matrix was obtained using a twin-screw extruder and injection molding machine through a process known as melt blending. The nanocomposites PP/GO were characterized by Raman spectroscopy, ATR-FTIR, XRD, FE-SEM and TG. In addition, the GO nanosheets were also characterized by Raman spectroscopy, ATR-FTIR, FE-SEM and XRD.