2024-05-232024-05-232024-04-05PAMPOLHA, Izabela da Costa. Fibras da coroa do abacaxi em compósitos de matriz ortoftálica: caracterizações físicas e mecânicas. Orientador: Deibson Silva da Costa. 2024. 92 f. Trabalho de Curso (Bacharelado em Engenharia de Materiais) – Campus Universitário de Ananindeua, Universidade Federal do Pará, Ananindeua, 2024. Disponível em: https://bdm.ufpa.br/jspui/handle/prefix/6993. Acesso em:.https://bdm.ufpa.br/jspui/handle/prefix/6993Natural fiber-reinforced composites refer to materials that combine fibers from natural sources with a polymeric matrix. These materials are of interest due to their ecological nature, lightweight, performance, biodegradability, and reduced cost. In this context, the aim of this work was to manufacture and characterize polymer matrix composites reinforced with pineapple leaf fiber. The composites were manually fabricated using the hand lay-up method in silicone molds. Fiber lengths of 15 mm and 30 mm were used, with mass ratios of 0%, 1%, 2%, and 3%. The polymer matrix used was unsaturated orthophthalic crystal polyester resin with the addition of 1% by volume of initiator and 1.5% by volume of accelerator. Morphological analysis of the fibers was conducted using Scanning Electron Microscopy (SEM). Specific mass was determined using the picnometer method. After manufacturing the composites, physical tests (ASTM D 570, ASTM D 2734, and ASTM D 792) and mechanical tests for tension (ASTM D 638) and flexion (ASTM D 790) were performed. Morphological analysis of the fibers revealed a rough and irregular texture on the surface. The specific mass of pineapple crown leaf fibers was determined to be 1.14 g/cm³. It was observed that the inclusion of pineapple crown fiber influenced the physical properties of the produced composites. The composition FCA - 15 mm 1% exhibited lower apparent specific mass, with a reduction of 3.84% compared to the Polymer Matrix (PM). All composites containing pineapple crown fiber showed increased apparent porosity and water absorption. The FCA - 30 mm 1% composition displayed higher porosity and water absorption. Tensile and flexural tests showed that compositions FCA - 15 mm 1% and FCA - 30 mm 3% achieved better results compared to other compositions with pineapple crown fiber. However, these results were inferior to those of the full matrix.Acesso AbertoFibras da coroa do abacaxiFibras lignocelulósicasCompósitosSustentabilidadePineapple crown fibersLignocellulosic fibersCompositesSustainabilityCNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICATrabalho de Curso - Graduação - Monografia