Dynamic vulcanization was successfully applied to epoxy resin reinforced polypropylene (PP)/ethylene-octene copolymer (POE) blends, and the effects of different compatibilizers on the morphology and properties of dynamically cured PP/POE/epoxy blends were studied. The results show that dynamically cured PP/POE/epoxy blends compatibilized with maleic anhydride-grafted polypropylene (MAH-g-PP) have a three-phase structure consisting of POE and epoxy particles dispersed in the PP continuous phase, and these blends had improved tensile strength and flexural modulus. While using maleic anhydride-grafted POE (MAH-g-POE) as a compatibilizer, the structure of the core-shell complex phase and the PP continuous phase showed that epoxy particles could be embedded in MAH-g-POE in the blends, and gave rise to an increase in impact strength, while retaining a certain strength and modulus. DSC analysis showed that the epoxy particles in the blends compatibilized with MAH-g-PP were more efficient nucleating agents for PP than they were in the blends compatibilized with MAH-g-POE. WAXD analysis shows that compatibilization do not disturb the crystalline structure of PP in the blends. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012