The SEM micrographs of PLA/GNP nanocomposites depict non-functionalized GNPs dispersed in stacked layers, partly exfoliated, with a nanoplatelet morphology characterized by a micron-scale length 0.5-2 µm and a nanoscale thickness. Similarly, layers with micron-scale lengths and nanoscale thicknesses, were observed in PLA/NC samples, while the NC exhibited better intercalation compared to GNP. This enhanced intercalation of NC is attributed to interactions between the hydroxyl groups of the organo-modified NC (Cloisite 30B) and the carboxyl groups of PLA which promotes clay dispersion within PLA matrices . of magnitude higher than that of pristine LPLA in the low-shear rate region, consistent with the higher molecular weight of HPLA, compared to that of LPLA. The viscosity curves of all of the nanocomposites appear to fall under their pristine counterparts. In the case of nanocomposites with GNP (Fig. ), the reduction in the viscosity curves is more pronounced compared to their counterparts containing NC (Fig. ). Although the reductions in the viscosity curves of HPLA/NC and HPLA/GNP are correlated with the additive content, the changes in the viscosity values of the LPLA/NC and LPLA/GNP samples are not correlated with additive content.