Mechanical Properties of Wood-Polypropylene Composites with Industrial Wood Particles of Different Sizes
Keywords:Industrial wood particle, injection, mechanical properties, particle size, polypropylene, wood-plastic composite
AbstractIndustrial wood particles used for manufacturing three-layer particleboards were used to prepare wood-polypropylene composites by an injection molding process. The effect of particle size (0.25-0.5, 0.5-1, 1-2, and 2-4 mm) on mechanical properties of composites was investigated. Additionally, the effect of cross-section size of composite pieces (4 x 10, 6 x 15, and 8 x 20 mm2) was studied. Both particle size and specimen cross-section area significantly influenced these properties. Tensile and mechanical properties as well as impact strength increased with increasing particle size from 0.25-2 mm and then slightly decreased. Flexural and impact strength decreased with increasing cross-section size, whereas variation of tensile modulus and strength and of flexural modulus with increasing cross-section size was different for composites with different particle sizes.
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