Abstract
The microvoiding mechanisms and mechanical properties of blends of poly(viny1chloride)(PVC) with hard/soft/hard three-layer core-shell structural particles polystyrene/polybutadiene/polymethylmethacrylate (PSBM) are investigated. The core-shell particles ranging from 110 to 182 nm to 254 nm. Toughened blends with higher tensile strength are obtained, which is related to the presence of hard polystyrene glassy domains in the core acting as stiffening agents. Cavitation occurs in all size rubber, relieves the triaxial tension and thereby promotes shear yielding of the PVC matrix. The three layer structure of the particles provides multi- interface, which act as trigger of cavitation. Furthermore, cavitiation in the blend containing small particles (110 nm) is observed due to its higher tensile stress, under which the cavitation process can be completed.
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