Estudo das propriedades mecânicas de biocompósitos de polipropileno reforçados com fibras naturais

• Ano de defesa: 2011
• Autor(a) principal: Bispo, Sistanley Jones Lima
• Orientador(a): Freire Júnior, Raimundo Carlos Silvério
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Rio Grande do Norte
• Programa de Pós-Graduação: Programa de Pós-Graduação em Engenharia Mecânica
• Departamento: Tecnologia de Materiais; Projetos Mecânicos; Termociências
• País: BR
• Palavras-chave em Português: Compósitos poliméricos granulados; Fibras de licuri; Fibras de curauá; Propriedades mecânicas; Extrusão.
• Palavras-chave em Inglês: Polymeric composites granulated; Licuri fibers; Curauá fibers; Mechanical properties; Drawing.
• Área do conhecimento CNPq: CNPQ::ENGENHARIAS::ENGENHARIA MECANICA
• Link de acesso: https://repositorio.ufrn.br/jspui/handle/123456789/15649

This research presents an approach to the addition of curauá fibers and licuri fibers in a polypropylene resin matrix, such as an alternative proposal to reinforce the polymeric composites. Fiber content of 0 %, 5 %, 10 %, and 20% were analyzed for verification of their mechanical properties comparing them, inclusive with the properties of polypropylene. The grainulated biocomposites had been prepared in an extrusora. The test bodies had been molded by injection and submitted to the mechanical essays uniaxial traction, flexion on three points, impact, in addition to thermal tests (HDT). These biocomposites had been also subjected the essay physicist-chemistry index of fluidity (IF). It was observed that the biocomposites of PP with 20% curauá, obtained bigger increase in the modulus of elasticity and a bigger reduction in the resistance to the impact. In the mechanical behavior, for all the biocomposites, these were increases in values of the limit of drainage and tension of rupture, when tested by uniaxial traction, as they added the fibers. Another important point was the increase of the resistance the flexion. It was also noted that the addition of fibers reduced the thermal degradation of the mixture natural fibers / polypropylene.