The blends composed of ternarypolymerization nylon(PA6-66-1010) and monomer casting polyamide 6(MCPA6) were obtained via the anionic polymerization.Various characterizations were conducted,including the analyses of crystallization and melting behaviors using differential scanning calorimetry(DSC),observation of morphology of fractured surface with scanning electron microscope(SEM),measurement of glass transition through dynamic mechanical analysis(DMA).The results suggest that crystallizing point,the fusion temperature,and the crystallinity of the blending decrease with the increase of PA6-66-1010.In addition,the blending system is toughed with the content of PA6-66-1010 increasing.Especially,the percentage of breaking-elongation of the bends is increased by 6 times when PA6-66-1010 content is 10%.PA6-66-1010 has the significant effect on percentage of breaking-elongation and toughness of the bends.