NANOCOMPOSITES OF POLYAMIDE 6/METALLOCENE POLYETHYLENE/GRAFTED SEES WITH MONTMORILLONITE

摘要

Nanocomposites of montmorillonite (MMt) and ternary blends of Polyamide 6/Metallocene Polyethylene/SEBS grafted with diethyl maleate (PA6/mcPE/SEBS-g-DEM) and maleic anhydride (PA6/mcPE/SEBS-g-MA) were prepared in an internal mixer (Rheomix) in order to improve the toughness of the nanocomposite counterpart prepared with PA6 and MMt. The PA6/MMt nanocomposite was the matrix or continuous phase whereas the mcPE was the dispersed phase and the grafted SEBSs were the compatibilizer agents. Tensile properties were measured and transmission and scanning electron microscopy were used to characterize the nanoclay and phase dispersion, respectively. The results showed that the incorporation of the metallocene polyethylene produced a decrease in the embrittlement of the nanocomposite unfolding a higher rupture strain. The use of SEBS-g-MA instead of SEBS-g-DEM is a better alternative from the mechanical behavior point of view. TEM micrographs showed that tactoid, intercalated and exfoliated structures were obtained.