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[en] Low-density polyethylene/plasticized starch blends (LDPE/PLST) at various compositions were prepared by melt extrusion and molding in the form of sheets under hot press. The rheology properties during mixing were studied in terms of torque and melting temperature against mixing time. The effect of different compatibilizers and electron beam irradiation on the miscibility of these blends was investigated by IR spectroscopy, mechanical testing and scanning electron microscopy (SEM). The rheology studies showed that the polyethylene graft copolymer with maleic anhydride (PEMA) as a compatibilizing agent during mixing has a pronounced effect than ethylene-vinyl copolymer (EVA) as seen from the higher torque values and melting temperatures. The IR spectroscopy suggests that the compatibilization by EVA and PEMA compounds proceeds through the formation of hydrogen bonding during mixing and this compatibility was improved after electron beam irradiation. The stress- strain curves of pure LDPE and its blends with PLST showed the behaviour of tough polymers with yielding properties. The SEM micrographs of the fracture surfaces give supports to the effect of EVA and PEMA as compatibilizers and electron beam irradiation.