Polypropylene/EPDM/Nano clay Nano composite: Review on Microstructure and Mechanical, Permeability, and Electrical Properties

The use of Nano materials, such as Nano clay, is one of the most effective methods for improving the properties of polypropylene )PP(-Ethylene Propylene Diene Monomer )EPDM( composite. In this study, after the introduction of PP, EPDM, PP/EPDM and PP/ EPDM/Nano clay )PEN( Nano composite, the results of studies on PEN Nano composites were reviewed including of the preparation methods, the effect of application of various Nano clay loads on the mechanical, electrical, gas permeability properties and microstructure of the PEN Nano composite prepared by the twin screw extruder, the microstructure evolution of the PEN Nano composite during mixing in the twin screw extruder, and finally the deformation of the PEN Nano composite by applying compressive and shear force. Based on the results, the tensile strength of PEN Nanocomposites containing up to 5% by weight of Nano clay improved compared to the pure compound, due to changes in the interfaces properties, and the restriction of the movement and displacement of polymeric chains by the Nano clay particles. Applying of 5% Nano clay particles reduced the permeability to Oxygen by 6%, the electrical volume resistivity up to 70% and the dielectric constant by 6% and also increased glass transition temperature and flame resistance by up to 100 °C. in general, mechanical and electrical properties of PEN Nano composite depend on the degree of Nano clay layers dispersion in the polymer matrix. The best way to prepare Nano composite is to use a twin screw extruder, so that all the components are extruded simultaneously.