Effect of compatibilizer and polyhedral oligomeric silsesquioxane on mechanical,thermal,and morphological properties of polyamide6/poly (ethylene-co-vinyl acetate) composites

Abstract

The mechanical properties and morphology of polyamide 6/maleic anhydride grafted ethylene-co-vinyl acetate (PA6/EVA-g-MA) ternary composites are considered a function of compatibilizer (EVA-g-MA) amount at a mixing combination of 20 wt% dispersed phase (combination of EVA and the compatibilizer). 1–7 wt% compatibilizer are added to PA6/EVA-g-MA, whereas the PA6 doping is kept constant at 80 wt% in the ternary composites. Furthermore, 0.5, 1, 3, and 5 wt% octa-Isobutyl POSS (OIP) is used for reinforcement. The thermal, mechanical, and morphological properties of PA6/EVA-g-MA composites have been studied through DSC, TGA, DMTA, traditional mechanical measurements, and SEM. Tensile strength and Young’s modulus declined by increasing the compatibilizer concentration. The impact strength of PA6/compatibilizer improved considerably up to 3 wt% of the compatibilizer and then decreased. TGA analysis demonstrated a considerable improvement in the thermal stabilities of the nanocomposites by raising the OIP amount. The results of DMTA, including T_g, and DSC analysis demonstrated that the inclusion of OIP in PA6/compatibilizer considerably changed the thermal properties of only PA6 in PA6/compatibilizer. Incorporating OIP into the composite up to 1 wt% improved its modulus, tensile, and impact strength.