MORPHOLOGICAL AND MECHANICAL CARACTERIZATION OF RECYCLED THERMOPLASTIC FOAMS REINFORCED WITH WOOD SUBPRODUCTS

Pablo Moreno, Denis Rodrigue, Yann Giroux, Aldo Ballerini, William Gacitúa

Abstract


The objective of the present study was to observe the morphology and characterize themechanical properties of wood plastic composite foams. Recycled high density polyethylene wasmixed with Pinus radiata D. Don (radiata pine) wood fiber of 60 mesh. The fiber concentrations were15 and 25% by weight. The compounds were foamed with a chemical agent ACA (azodicabonamide)and MAPE (Epolene E-20) was used as a coupling agent. The composites were obtained by twin–screw extrusion. The results showed that the coupling agent had a positive effect on the adhesion ofthe recycled polymer and wood fiber. The density of the compounds decreased with blowing agentand the mechanical properties of hardness, impact, modulus of elasticity in bending and tension werehigher for unfoamed composites. It was concluded that increasing the concentration of fiber increasesthe mechanical properties with the exception of impact resistance of the compounds that byincorporating the blowing agent decreased slightly.

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