Comparação das propriedades mecânicas entre polipropileno reciclado e composto com fibra natural prensados e injetados

Abstract

In this work, composite materials based on natural fibers and recycled thermoplastic materials were developed. Three different compositions were used, 100% recycled polypropylene, 80/20 wood powder and 80/20 natural fiber from Palmeira Imperial. The specimens were produced using hydraulic pressing and injection, using material pellets that were dried in an oven for 48 hours. It was used for characterization, mechanical tensile testing, thermal analysis of Thermogravimetry and Exploratory Scanning Calorimetry and fluidity index. During the fluidity index test, the recycled polypropylene presented a fluidity of 15.07 g/10min and the composite with a wood dust load of 10.90 g/10min while the composite with natural fiber degraded during the process, preventing the analysis from being completed. The tensile strength of the three injected materials was close to that of the composite with wood powder was 22.81 MPa, the composite with imperial palm fiber was 24.31 MPa and the recycled polypropylene was 25.88 MPa and the pressed materials were wood powder 4.01 MPa, the composite with imperial palm fiber 5.43 MPa and the recycled polypropylene 7.59 MPa.