IMPROVED INTERACTION EFFECTED BY MALEIC ANHYDRIDE-GRAFTED POLYPROPYLENE IN PRP TRIBLOCK POLYMER EVA BLEND

The role of anhydride-grafted polypropylene in the ethylene-propylene triblock polymer and ethylene-vinyl acetate copolymer blend has been studied. Maleic anhydride grafted onto polypropylene interacts with polymer components in the blend and also improves the dispersion of the rubber phase in the plastic matrix. Improved interaction is reflected in the ultimate properties of the blend. Blends with good impact resistance and low-temperature brittleness may be obtained by optimizing the modifier concentration. Composition with good low-temperature brittleness is achieved by lowering the glass transition temperature of the plastic phase by adding a low concentration of modifier. Impact strength of the studied blend does not depend only on the reactive maleic anhydride content but also on the type of modifier. Generally, an increase in interfacial surface area improves impact strength.