<p>Polypropylene nanocomposites were prepared by blending with microencapsulated additives [Silane Treated Ammonium Polyphosphate and Triazine Microencapsulated in Melamine Formaldehyde Resin] along with carboxyl functionalized MWCNT as reinforcing material using maleic anhydride as compatibilizer. Polypropylene woven cloth (1&#xa0;mm) was sandwiched between each set of blended sheets for obtaining polypropylene multilayered reinforced nanocomposites. They were characterized for physical and mechanical properties such as density, hardness, impact strength, tensile, compressive and flexural properties and cone calorimetry. The density and hardness showed an increasing trend with increase in additive content from 10% to 30% in both the categories i.e., with and without microencapsulated additives, whereas impact strength decreased with increase in additives content. The tensile modulus increased whereas compressive and flexural strength decreased with increase in microencapsulated additives in the nanocomposites as compared to their non-microencapsulated counter parts. The microencapsulated nanocomposites have shown superior physical and mechanical characteristics over the non-microencapsulated nanocomposites. The tensile fractured morphology and distribution of additives in the composites were examined and analyzed using Scanning Electron Microscopy and Transmission Electron Microscopy, respectively. Incorporation of microencapsulated additives in the nanocomposites resulted in enhanced flame retardancy characteristics with formation of intumescent char residues. Thus, the developed microencapsulated nanocomposites find usefulness in infrastructure sectors such as roofing shingles, structural integrated panels etc., due to its better mechanical properties and flame retardancy.</p> Graphical abstract <p></p>