2026-01-082026-01-082025-12-09NASCIMENTO, Joelly Vera. Obtenção e caracterização de compósitos de matriz poliéster reforçados com fibras naturais de munguba (pseudobombax munguba). Orientadora: Verônica Scarpini Cândido. 2026. 84 f. Trabalho de Curso (Bacharelado em Engenharia de Materiais) – Faculdade de Engenharia de Materiais, Campus Universitário de Ananindeua, Universidade Federal do Pará, Ananindeua, 2025. Disponível em: https://bdm.ufpa.br/handle/prefix/9036. Acesso em:.https://bdm.ufpa.br/handle/prefix/9036The growth in the consumption of natural resources, such as water and energy, associated with the increase in waste generationg including greenhouse gases, effluents, and chemical compounds has intensified concerns related to sustainability. In this context, natural fibers from the Amazon, which are derived from plants and agricultural residues, stand out for being renewable. Therefore, the present work aims to evaluate the performance of fibers and composites with 10, 20, and 30% volume fractions of munguba fibers (Pseudobombax munguba), originating from the Amazon region, in a polyester polymer matrix, in order to investigate their mechanical properties and their physical, chemical, and morphological characteristics by Scanning Electron Microscopy (SEM), functional groups by Fourier Transform Infrared Spectroscopy (FTIR), and thermal behavior by Thermogravimetric Analysis (TGA). FTIR revealed functional groups typical of cellulose, hemicellulose, and lignin, confirming the lignocellulosic composition. TGA indicated moderate thermal stability up to 200 °C, and SEM showed that finer fibers exhibited rough surfaces favorable to mechanical anchoring, whereas thicker ones displayed low roughness. Tensile tests of the fibers revealed maximum strength values of 115.96 MPa and a Young’s modulus of 1.57 GPa, demonstrating an inverse relationship between diameter and strength. In the composites, the neat matrix exhibited the highest tensile strength; however, with the addition of 10% fiber, a significant reduction was observed, while at 20% and 30% there was a slight recovery in strength and an initial increase in Young’s modulus. In the flexural strength tests of the composites, an increase in the modulus was observed with 20% fiber, reaching 81.92 MPa. Analysis of variance (ANOVA) for flexural tests indicated significant differences in Young’s modulus, evidencing the moderate effect of the fiber on the mechanical behavior. Thus, it is concluded that munguba fiber shows promising potential as reinforcement in polymer composites, contributing to the development of sustainable materials and the valorization of the natural resources of the Amazon.Acesso AbertoCompósitos poliméricosFibra de mungubaPropriedades mecânicasPolymeric compositesMunguba fiberMechanical propertiesCNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS::POLIMEROS, APLICACOESTrabalho de Curso - Graduação - MonografiaAttribution-NonCommercial-NoDerivs 3.0 Brazil