Caracterización y fabricación de madera plástica a partir de la mezcla de aserrín de Pigüe con tereftalato de polietileno reciclado

Abstract

In the field of Materials Engineering, the demand for improving the mechanical properties of new materials is growing. Experimental design (DOE) with response surface methodology (MSR) under Box– Behnken design was used in this experimental work. This approach allows the manipulation of three input factors with three levels each: extrusion temperature (160, 170 and 180 degrees Celsius), size of Pigüe scrape fibers (No.30, No. 40 and No. 50, under ASTM E11) and percentage of recycled polyethylene terephthalate (PET 1) (92, 95 y 98 percent). To investigate the behavior of the results obtained and identify their optimal performance points. This methodology facilitated the evaluation of mechanical properties by means of traction tests (ASTM D638-14), compression tests (ASTM D695-15) and flexion tests (ASTM D790-17), followed by the compilation and analysis of the data obtained. Traction, compression and flexion results were tabulated and an analysis was carried out which cast the following suitable case: a thimble number of 30 (ASTM E11) for the size of the particles of the shell, with a 98 percent percentage of PET 1 in the mixture and an extrusion temperature of 160 degrees Celsius. This suitable case exhibits the following mechanical characteristics: for traction, a strength of 13.97 MPa, for compression, a resistance of 3.60 MPa and for bending, a maximum effort of 19.84 MPa. Finally, the design regression model MSR reflects a global desirability value of 0.6085. Keywords: MSR, Box–Behnken, Pigue, PET recycled, D