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The particle surface of nanometer calcium carbonate (nano‐CaCO3) was treated by fatty acid and titanate coupling agent, and polypropylene (PP) composites filled with nano‐CaCO3 with the volume fraction range from 0 to 3.0% were prepared by means of melt blending in a twin‐screw extruder. The V‐notched impact strength of the nanocomposites was measured at room temperature. The V‐notched impact fracture...
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