Tensile Behavior of lignocellulosic reinforced polyester composites: Part III coir fiber

AUTOR(ES)

Santafé Júnior, H.P.G., Lopes, F.P.D., Costa, L.L., Monteiro, S.N.

FONTE

Matéria (Rio de Janeiro)

DATA DE PUBLICAÇÃO

2010

RESUMO

The fiber extracted from the husk of a coconut fruit, known as coir fiber, has been extensively investigated as a second phase incorporation into polymer composites. The moderate strength of the coir fiber usually does not represent reinforcement to relatively strong thermoset matrices such as polyester, epoxy and phenolic. However, a selection of thinner coir fibers and a post cure treatment of the composite could improve its mechanical performance. Therefore, this work investigated the tensile properties of post-cured polyester matrix composites incorporated with the thinnest coir fiber. Tensile specimens with up to 40% in volume of long and aligned coir fibers were tested and their fracture analyzed by scanning electron microscopy. A relatively improvement was found in the tensile properties for the amount of 40% of coir fiber. These results were compared with similar composites that were bend-tested. The fracture analysis showed a comparatively better fiber/matrix adhesion.

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