Effect of compatibilizer concentration on properties of polypropylene-clay nanocomposities;Effect of maleated polypropylene on the melt compounding of polypropylene/clay nanocomposites; Effect of mixer type on exfoliation of polypropylene nanocomposites;Effect of mixing element in a single screw extruder on the microstructure of polypropylene/montmorillonite nanocomposites;Effect of physical foaming agents on the viscosity of various polyolefin resins;Effect of process variables on melt temperature profiles in extrusion process using single screw plastics extruder;