Polymer Engineering and Science · 1992 · 99 citations · 4 references
Natural SciencesMaterials EngineeringMaterials ScienceMechanical Behavior Of MaterialsPolymer EngineeringPolymer MaterialsComposite MaterialsFracture ToughnessNanocompositesPolymer CompositesPolymer NanocompositesStrength Of MaterialsHigh-density Polymer CompositesImpact StrengthInorganic Filler ContentLarge Plastic StrainMechanical Properties Of NanocompositesNanocomposite TougheningParticle-reinforced Polymer CompositesToughening Mechanisms
Abstract High density polyethylene (HDPE) is toughened by particles of rigid inorganic filler CaCO 3 , which is treated with phosphate. The stress‐strain curve of the HDPE/modified‐CaCO 3 (80/20) composite covers a greater area than that of HDPE, and the impact strength of HDPE is greatly improved by modified CaCO 3 from 230 J/m to 580 J/m as CaCO 3 content is increased to 50 wt%. Morphological observation indicates a finer dispersion of the modified‐CaCO 3 particles and a large plastic deformation of HDPE. The cavitation and stress field interaction around the particles are considered to explain the toughening mechanism.
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