Ito, Edson NoriyukiSilva, Tânia Evyllyn Dias da2023-06-152023-06-152023-03-31SILVA, Tânia Evyllyn Dias da. Desenvolvimento de blenda PET reciclado / PET tecido para aplicações têxteis. Orientador: Edson Noriyuki Ito. 2023. 110f. Dissertação (Mestrado em Engenharia Têxtil) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2023.https://repositorio.ufrn.br/handle/123456789/52714Plastic consumption has generated some environmental problems, such as contamination of the environment through their waste resulting from improper disposal. Due to their characteristics, particularly their decomposition time, plastics break down and are mistaken for food by marine animals, leading to increased mortality in rivers and seas. In light of these problems, it is necessary to develop actions that reduce these impacts, such as recycling these materials and using circular economy, which emphasizes concern for the life cycle of products and their applications. The work aimed to develop a filament applicable in the textile industry, resulting from the combination of recycled poly(ethylene terephthalate) (PETr) from bottle grade and recycled woven PET (PETr) from the garment clothing industry. The PETr/PETt binary blend with and without the use of ethylene-methyl acrylate-glycidyl methacrylate copolymer (EMA-GMA) as a chain-extending agent was plasticized and homogenized in a twin screw extruder with d = 16 mm and l/d = 40, varying the compositions in 10 wt% of PETt in PETr until the composition of 100 wt% of PETt and, using 3 wt% of EMA-GMA in the formulations of these mixtures. After the production of polymeric mixtures, rheological characterizations were carried out by melt flow index (MFI) measurements, thermal characterization by differential scanning calorimetry (DSC), physicochemical characterization by X-ray fluorescence (FRX), mechanical characterization by uniaxial tensile and, morphological characterization by scanning electron microscopy (SEM). Previous work showed that the EMA-GMA copolymer showed evidence of reaction with PET and the results of the characterizations in this work corroborated the results obtained previously. The MFI results indicated the flow and stability of the blends as a function of temperature, and the tensile test results (tensile strength, elongation at break, and modulus of elasticity) showed the materials with the best mechanical properties, confirming the optimization and definition of the best compositions to be processed in a single-screw extruder with d = 16 mm and l/d = 26, aiming to produce textile filaments. FRX analysis performed on PETt identified the presence of titanium dioxide (TiO2), which is used as a white pigment in clothes. The photomicrographs obtained by SEM showed phase separation between the two types of PET, recycled bottle grade and woven. The pure polymers were processed under the same conditions, having the same thermal history and were used as a reference for the final quality of the filaments produced from the polymeric mixtures. The results of the characterizations showed that the mixtures with 60, 70 and 90 wt% of PETt were the materials that presented the best results to be applied in the manufacture of textile filaments. Titration measurements were made on these textile filaments, and their thickness was measured by SEM. We can conclude that the filaments obtained can be used for the production of technical textile materials, according to flat fabric with canvas pattern, obtained through manual weaving. Demonstrating evaluation and feasibility of use for the material obtained.Acesso AbertoPoli(tereftalato de etileno) recicladoTecidos de poliésterEMA-GMADióxido de titânioExtrusãomasterThesisCNPQ::ENGENHARIAS