The composites were obtained through hot extrusion of a mixture of recycled polymers (HDPE and PS) and sugar cane fibers. The extrusion technique resulted in homogeneous materials with good mechanical properties and the factorial design allowed the analysis of the factors that influence the process. Samples containing high density polyethylene (HDPE), both with 30% and 50% fibers were shown to be significantly more effective compared to polystyrene (PS) aiming at impermeability in the presence of water. The composites obtained with HDPE showed bending resistance, with 45 MPa (50% fiber) and 39MPa (30% fiber) maximum applied stress, these values are higher than those presented in the composites obtained with PS. Composites of polymers and wood (60% of sawdust) provide bending resistance of about 32 MPa and MDF has a bending resistance of 36 MPa, these results show that the compounds obtained have a good bending resistance.
composites; recyclable polymers; natural fibers; extrusion technique