Performance of dynamic crosslinked polypropylene/ethylene-octene copolymer blends

Dynamic crosslinked polypropylene/ethylene-octene copolymer(PP/POE)blends were prepared by using dynamic crosslinked method.The torque of PP/POE blends was studied using a Hakke Rheometer.Effect of the amount of DCP and POE on mechanical properties and rheological properties of dynamic crosslinked PP/POE blends was investigated.The results show that the torque of PP/POE blends increases firstly with increasing DCP and then decreases to the balance;the impact strength of the blends increases obviously,but tensile strength decreases slightly with increasing POE content;the suitable proportion of PP/POE is 100∶40,and the optimal amount of DCP is 2% of POE content;the rheological behavior of dynamic crosslinked PP/POE blends belongs to pseudoplastic fluid,the degree of degradation reaction is higher than that of crosslinking reaction at high temperature of 220℃.