Estudo do comportamento mecânico de compósitos reforçados com fibra vegetal de malva (Urena Lobata L.)

Abstract

The growing concern for the environment has aroused interest in the constant search for viable alternatives for sustainable development. Within this context, composite materials have an important role, as the use of natural fibers as a substitute for various synthetic reinforcements or fillers in polymer composites has shown a great potential for technological applications. The fibers to be used in this work are classified as arising from strengthening lamellar maceration of woody marrow or sticks malva (Urena lobata L.), which is typical of tropical regions of the country. Therefore, this work aims to develop and characterize mechanically polymer composites based on unsaturated polyester reinforced by filaças Malva (Urena lobata L). In which were arranged in alternating layers in the polymeric matrix in order bidirectional and unidirectional before and after the mercerization process for the study of mechanical properties in flexural and impact according to ASTM D-790 and D-256, respectively . The composites were prepared with varying amounts of fibers being applied to compression molding process, the plates obtained underwent a post-cure of 48 hours at a temperature of 80 ° C. The bodies of the specimens were sawn manually for testing of flexural and impact, thereafter the results were interpreted and discussed. It was concluded that the material under study showed satisfactory mechanical behavior, one extraordina