Preparação de nanocompósitos de poliésteres aromáticos/TiO2 por polimerização In SITU

Abstract

Due to search for different properties in polymeric materials, have increasing studies in the composites and the nanocomposites field, using inorganic fillers. Within this context one this work, which has as main objective to study experimentally the synthesis and characterization of nanocomposites of aromatic polyesters / titanium dioxide (PEA/TiO2), using raw materials trade. To do so, it was used the in situ polymerization technique to prepare the nanocomposites with PEA/TiO2 with different concentrations of the load (0%, 0.5%, 1.0%, 2.0%, 3.0% and 5.0% m/m of the polymer mass). It was used as starting materials: dimethyl terephthalate (DMT), polyethylene terephthalate (PET) and a mixture of 1,4-butanediol and 1,6-hexanediol. The nanocomposites were characterized by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA) and Gel Permeation Chromatography (GPC). Shore D hardness, contact angle and X-ray Diffraction (DRX). The results show that there was an interaction filler/polymer evidenced by XRD and FTIR analysis. The thermal properties of nanocomposites suffered no significant changes. It was also possible to observe a change in the surface of the synthesized material indicating good compatibility btween filler and polymeric matrix and a decrease of surface hydrophilicity (measured by the contact angle) as well as an increase in hardness of the material compared to pure polymer.