Influência de cargas de reforço nas propriedades mecânicas de compósitos de matriz polimérica

Abstract

A proposal for the use of vegetable fibers in polymer matrix composites together with an industrial need to characterize the composite reinforced with calcium carbonate is the motivation of the work. Due to the importance of the development of the materials, a mechanical characterization of the reinforcement, of the matrix and finally of the composite is fundamental for the study of its application. In this work, for the bamboo reinforced composite, the direction of the fibers and the superficial treatments in the fibers were varied and for the composite with calcium carbonate the percentage of the added reinforcement was varied. After obtaining the results, it was realized that the composite with the bamboo fibers oriented in the same direction of the tensile test supported the higher tensile stress, whereas the acetylation treatment also provided an increase in the tensile strength supported by the composite. Besides that, it was also realized that the addition of calcium carbonate in the polymer matrix reduced the stress supported by the material, however, increased its rigidity. Therefore, it was possible to verify the influence of several parameters on the mechanical properties of two different recycled polypropylene matrix composites.