Investigation on the Mechanical, Thermal propertiesof Polyamide 6/Polypropylene Blends with Natural Talc as filler

摘要

The development of polymer blends has attracted great interest over the past decades and is currently considered as very active area of science of great economic importance allowing to synthesize materials with enhanced performances through low cost processing. Particle filled polymer blends have become attractive because of their wide applications and low cost. Incorporating inorganic mineral fillers into polymers improves various physical properties of the materials such as mechanical strength, modulus and heat deflection temperature. In general the mechanical property of particulate filled polymer blends depends strongly on size, shape and distribution of filler particles in matrix polymers and good adhesion at the interface surface.In this study, the influence of adding talc fillers on the mechanical properties of polyamide 6/polypropylene (PA6/PP) blends was investigated. They were chosen in order to establish a comparative study in terms of their contributions on the improvement of the morphology as well as the final properties of PP/PA6 blends prepared by melt mixing using twin screw extruder followed by injection molding. Incorporation of natural talc fillers greatly improves thermal stability of PP matrix. Highest elastic modulus and best ductility was obtained in presence of natural talc. The role of the surface characteristics of talc has been highlighted. Then the positive changes induced by talc on morphology, kinetics, thermal and mechanical properties of blends have been studied. Thus, this better dispersion greatly improves the thermal stability of PP/PA6 blends and leads to better mechanical properties (+ 40% in Young's modulus).