eng Oriental Scientific Publishing Company Biosciences Biotechnology Research Asia 0973-1245 2016-06-08 11 Spl.Edn.1 135 141 10.13005/bbra/1402 11782 article N. Manoharan 1 V. Selvakumar 2 Director Research, AMET University, Chennai - 603112, India. Research Scholar, AMET University, Chennai - 603112, India. This article addresses the effect of Multiwalled carbon nanotubes (MWNTs) on the mechanical properties of polypropylene (PP)/ Montmorillonite (MMT) nanocomposites. PP/MWNT/MMT hybrid nanocomposites have been prepared by melt mixing using maleic anhydride grafted polypropylene (MAH-g-PP) as compatibilizing agents. Melt mixing was achieved using twin screw extruder. The MAH-g-PP used as compatibilizer helped the dispersion of the MWNTs in PP/MMT matrix. The effect of MWCNTs on the PP/MMT nanocomposites was investigated in terms of mechanical properties and morphological using Transmission electron microscope (TEM), X-ray diffraction (XRD), tensile test, flexural test and notched Izod impact test. These were compared with the conventional polypropylene-clay nanocomposite. The resulting composite shows about 33% increase in tensile modulus and 20% in the impact strength when compared with binary combination of PP/MMT nanocomposite. https://www.biotech-asia.org/vol11_nospl_edn1/effect-of-mwnts-on-mechanical-properties-of-ppmmt-nanocomposites/ Multiwall Carbon Nanotubes (MWNTs); Montmorillonite (MMT); HybridNanocomposites; Scanning electron microscope (SEM): Mechanical characterization