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El objetivo del presente estudio fue observar la morfologia y caracterizar las propiedades mecanicas de materiales compuestos de madera y plasticos reciclados espumados. Se mezclo polietileno de alta densidad reciclado con fibra de madera de Pinus radiata D.Don (pino radiata) de 60 mesh. Las concentraciones de fibra fueron de 15 y 25% en peso, el polimero se espumo con un agente quimico ACA (azodicarbonamida) y se utilizo anhidrido maleico MAPE (Epolene E-20) como agente de acoplamiento. Los compuestos se obtuvieron usando un proceso de extrusion en un equipo doble tornillo. Los resultados demostraron que el agente acoplamiento tuvo un efecto positivo sobre la adherencia del polimero reciclado y la fibra de madera. La densidad de los compuestos disminuyo con el agente espumante y las propiedades mecanicas de dureza, impacto, modulo de elasticidad en flexion y traccion fueron superiores para los compuestos no espumados. Se concluyo que al aumentar la concentracion de fibra aumentaron las propiedades mecanicas de los compuestos a excepcion de la tenacidad que al incorporar el agente espumante disminuyo ligeramente. Abstract The objective of the present study was to observe the morphology and characterize the mechanical properties of wood plastic composite foams. Recycled high density polyethylene was mixed with Pinus radiata D. Don (radiata pine) wood fiber of 60 mesh. The fiber concentrations were 15 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 of the recycled polymer and wood fiber. The density of the compounds decreased with blowing agent and the mechanical properties of hardness, impact, modulus of elasticity in bending and tension were higher for unfoamed composites. It was concluded that increasing the concentration of fiber increases the mechanical properties with the exception of impact resistance of the compounds that by incorporating the blowing agent decreased slightly.

CARACTERIZACIÓN MECÁNICA Y MORFOLÓGICA DE TERMOPLÁSTICOS RECICLADOS ESPUMADOS REFORZADOS CON SUB PRODUCTOS DE MADERA