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Local elastic properties and microstructural features of low-density polyethylene-polypropylene (LDPE-PP) blends have been studied by microacoustical. Focused altrasonic beam of acoustic microscope has been employed to measure clastic wave velocities, bulk and shear elastic moduli and Poisson ratio. The experiments show that the mechanical propertices of immiscible LDPE-PP blends are non-additivily...