Journal
POLYMER INTERNATIONAL
Volume 55, Issue 2, Pages 158-164Publisher
WILEY
DOI: 10.1002/pi.1932
Keywords
poly(vinyl chloride); nanoparticles; surface treatment; microstructure; interface; impact strength; tensile strength
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The effects of particle size and surface treatment of CaCO3 particles on the microstructure and mechanical properties of poly(vinyl chloride) (PVC) composites filled with CaCO3 particles via a melt blending method were studied by SEM, an AG-2000 universal material testing machine and an XJU-2.75 Izod impact strength machine. The tensile and impact strengths of CaCO3/PVC greatly increased with decreasing CaCO3 particle size, which was attributed to increased interfacial contact area and enhanced interfacial adhesion between CaCO3 particles and PVC matrix. Titanate-treated nano-CaCO3/PVC composites had superior tensile and impact strengths to untreated or sodium-stearatetreated CaCO3/PVC composites. The impact strength of titanate-treated nano-CaCO3/PVC Composites was 26.3 +/- 1.1 kJ m(-2), more than three times that of pure PVC materials. The interfacial adhesion between CaCO3 particles and PVC matrix was characterized by the interfacial interaction parameter B and the debonding angle theta, both of which were calculated from the tensile strength of CaCO3/PVC composites. (c) 2005 Society of Chemical Industry.
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