Reactive compatibilization of polystyrene/polyethylene blends containing basic functionalized polymer

Blends oi polystyrene(PS) with polyethylene(PE) or PE melt grafted with maleic anhydride (PE-g-MAH) and copolymer [Poly (Sr-Co-DMA)] oi styrene (St) with dimethyl amino ethyl methacrylate(DMA) were prepared by blending in a Brabender mixer, The morphology of these blends was found to have the typical morphology of incompatible blends, where their reactive PS/PE-g-MAH/Poly(St-Co-DMA) blends showed a finer morphology, the particle size was greatly reduced and the size distribution became more uniform, This was attributed to the stronger polar interaction between the acidic anhydride and basic amino groups. Furthermore, the dynamic mechanical analysis measurements showed that the two glass transition temperature(T-g) peaks of reactive blends were closer than those oi corresponding nonreactive blends. The mechanical properites of blends were improved.