Adhesion in polyamide/compatibilizer/polypropylene systems

The effect of compatibilization on the adhesion, fracture toughness, morpho logy, and mechanical properties of isotactic polypropylene (PP)/polyamide 6 (PA) blends was investigated. Maleic anhydride (MAH) functionalized poly(e thylene-co-vinyl acetate) (EVA-g-MAH) and nonreactive EVA copolymer were us ed as compatibilizers in binary blends. An attempt of in situ compatibiliza tion via addition of pure maleic anhydride to PA/EVA/PP melt was also made. The blends containing maleated EVA copolymer showed more regular and finer dispersion of phases, better adhesion at the interface, and improved mecha nical properties.