Brittle-ductile Transition of PP/EPDM/Elastiomeric Nano-meter Particle (ENP) Ternary Blends

The brittle-ductile transition of PP/EPDM/Elastomeric nano-meter particle (ENP) was studied. Compared to PP/EPDM binary blends, the brittle-ductile transition of PP/EPDM/ENP ternary blends occurred at lower EPDM content. The impact strength of ternary blends was higher than that of binary blends as the total rubber content was the same and the tensile strength increased to a certaim extent. The process from brittle to ductile of the impact fracture surface was observed by means of SEM. When EPDM content was the same, PP/EPDM/ENP ternary blends had smaller particle size, better dispersion and a smaller interparticle distance in contrary to PP/EPDM binary blends, which promoted the brittle-ductile transition.