This study summarizes our current research in using different types of nanographene platelets (NGPs) to create polymer-graphene nanocomposites for selective laser sintering manufacturing application. This article describes five NGPs that were available to our research group. Morphological characterization of their microstructures was examined using scanning electron microscopy. Thermal characterization of these NGPs was conducted using thermogravimetric analysis. Kinetics of these NGPs was calculated using the isoconversion technique. Similarities and differences of these NGPs were drawn from the above measurements and calculations. Two NGPs were selected for further studies.