Abstract: Maleic anhydride was grafted onto propylene-based elastomer via melt reaction in a twin-screw extruder. The influences of initiator, MAH concentration, crosslinking inhibitor, and processing condition on the structure and properties of product were analyzed using FTIR, neutralization titration. It indicated that with increasing initiator concentration the grafting degree increased first and then dropped. With increasing MAH concentration, the grafting degree increased first and then leveled off. The crosslinking during grafting was best inhibited by hexanolactam. The toughening effect of the product and traditional POE-g-MAH were compared in nylon, and it was found that the grafted product achieved both better tougheness and flowability of polyamide.

Key words: propylene-based dlastomer, maleic anhydride, grafting, high flow, toughening