Properties of polypropylene composites filled with a mixture of household waste of mate-tea and wood particles

• Polymeric composite was developed using household and industrial residues.
• Effect of waste of mate-tea as filler was physically, chemically and mechanically evaluated.
• Thermal stability of PP decreased with addition of mate-tea waste and eucalypt particles.
• Use of eucalypt particles increased mechanical properties more than use of mate-tea waste.
• Insertion of eucalypt particles increased the hydrophobicity of the composites.

This study presents the preparation of polypropylene composites filled with mixtures of household waste of mate-tea and eucalypt particles and aims to increase the economic value chain of mate-tea. Filler mixtures in proportions ranging from 0% to 60% with a fixed PP matrix at 40% were prepared in order to evaluate only the effect of the filler on thermochemical, physical and mechanical properties and on the morphology. The main findings showed that the addition of filler from natural sources decreased thermal stability of composites, but that the temperature of crystallisation increased. Composites with a higher proportion of wood particles showed higher hydrophobic character; however, only the composites with 60% and 54% of mate-tea waste particles showed significantly higher results for water absorption. The use of eucalypt particles increased more mechanical properties than that of household waste, which proves its efficiency as filler. Nevertheless, the use of household waste also increased the properties of the final product and showed that it can be a good alternative for the use of renewable materials in the production of polymeric composites.