Mejoramiento de las propiedades físicas y mecánicas de Polipropileno (PP) reciclado mediante la adición de Polietileno Tereftalato Reciclado (PET) por proceso de extrusión.

Abstract

The purpose of this study is to improve the properties of recycled polypropylene by adding recycled polyethylene teraphthalate (PET) in several percentages and including a coupling agent such as phthalic anhydride. To do this we proceeded to obtain scales of the two materials previously washed and dried; the mixture of polypropylene and polyethylene terephthalate is fed into the hopper directly by working with three temperature profiles and different percentages of PET proposed (5%, 10%, 20% and 30%). The specimens obtained under each of these parameters were subjected to mechanical tests for their characterization where, based on the results obtained, the temperature profile that best suited the expected needs was defined, as well as the temperatures of the feed hopper to the nozzle were 155/190/190/190 °C respectively, and a screw speed of 350 rpm; the optimum percentage of PET determined corresponds to the mixture of PP / PET-30%. With these parameters a compatibility of the materials was made by adding phthalic anhydride in percentages of 1%, 2% and 3% to determine the behavior of the mixture, evidencing an improvement of 8% resistance to tensile stress and 56, 81% in the hardness parameter.