The study was aimed to investigate the improved interaction of polypropylene (PP) matrix and multi-walled carbon nanotubes (MWNTs) via the use of a non-covalent modifier, Lithium salt of 6-amino hexanoic acid (Li-AHA) and a compatibilizer, polypropylene grafted maleic anhydride (PP-g-MA). Composites of PP and MWNTs were prepared with pristine as well as Li-AHA modified MWNTs with PP-g-MA by melt-mixing in a conical twin-screw micro-compounder. MWNTs were further extracted from pristine as well as modified PP/MWNTs composites. X-ray diffraction analysis (XRD) showed characteristic diffraction peaks of -crystalline phase of PP for MWNTs extracted from modified PP/MWNTs composites with MWNTs: Li-AHA ratio of 1:2 and 1:4 (wt/wt). However, extracted MWNTs corresponding to PP/MWNTs composites of pristine did not show any crystallization peak corresponding to the PP phase. Differential scanning calorimetric analysis showed the crystallization peak of the PP phase for MWNTs extracted from PP/MWNTs composites with Li-AHA modified MWNTs (1:4 wt/wt) indicating the presence of crystallizable PP phase. Thermo-gravimetric analysis showed degradation behaviour corresponding to the PP phase, which was not visible in the pristine MWNTs indicating the presence of the PP phase. FTIR spectroscopic analysis also could detect the melt-interfacial reaction between maleic anhydride functionality of PP-g-MA and amine functional group of Li-AHA, which could improve the interfacial interaction between PP chains and the MWNTs