New super-tough poly(butylene terephthalate ) materials based on compatibilized blends with metallocenic poly(ethylene-octene) copolymer

摘要

New super-tough poly(butylene terephthalate) (PBT)/ poly(ethylene-octene) copolymer (PEO) blends containing 2 wt% poly(ethylene-co-glycidyl methacrylate) (EGMA) as a compatibilizer were obtained by extrusion and injection molding. The blends comprised of an amorphous PBT-rich phase with some miscibilized EGMA, a pure PEO amorphous phase; and a crystalline PBT phase that was not influenced by the presence of either PEO or EGMA. The blends showed a fine particle size up to 20 wt% PEO content. Super-tough blends were obtained with PEO contents equal to or higher than 10%. The maximum toughness was very high (above 710 J/m) and was attained with 20% PEO without chemical modification of the commercial components used.