Freire Júnior, Raimundo Carlos SilvérioBispo, Sistanley Jones Lima2014-12-172012-01-262014-12-172011-06-20BISPO, Sistanley Jones Lima. Estudo das propriedades mecânicas de biocompósitos de polipropileno reforçados com fibras naturais. 2011. 97 f. Dissertação (Mestrado em Tecnologia de Materiais; Projetos Mecânicos; Termociências) - Universidade Federal do Rio Grande do Norte, Natal, 2011.https://repositorio.ufrn.br/jspui/handle/123456789/15649This 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.application/pdfAcesso AbertoCompósitos poliméricos granuladosFibras de licuriFibras de curauáPropriedades mecânicasExtrusão.Polymeric composites granulatedLicuri fibersCurauá fibersMechanical propertiesDrawing.masterThesisCNPQ::ENGENHARIAS::ENGENHARIA MECANICA