Efeito da inserção de nanopartículas de TiO2-OPM sobre as propriedades do PET reciclado

Abstract

Poly (ethylene terephthalate) (PET) is one of the most consumed polymers today, mainly in the fast-disposable beverage market, its excellent properties associated with its low production cost, make it one of the most consumed polymers in the world. However, unfortunately, this high consumption has led to an increase for waste generated by its irregular disposal, which is why recycling becomes more and more important. However, the processing of PET during recycling can decrease its molar mass, impairing its mechanical and thermal properties. Thus, this work aims to evaluate the effect of the insertion of TiO2 nanoparticles synthesized by the route of peroxide oxidizing complexes, which present the surface modified with the peroxide group (TiO2-OPM) thus increasing the reactivity of the nanoparticles in the polymer matrix of recycled PET. The materials obtained were characterized by thermal analysis techniques such as differential scanning calorimetry (DSC) and thermal analysis (TG) and structurally by X-ray diffractometry (XRD) and Raman scattering spectroscopy. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were also used to verify the morphologies of these materials. Rheological measurements and intrinsic viscosity measurements were also performed. The extrusion process successfully obtained the nanocomposites of recycled PET with the insertion of the nanoparticles. The results of the analysis of the samples of these materials showed that there was an interaction between the nanoparticles and the polymeric matrix of recycled PET, and had an influence on their properties.