Title

THE DYNAMIC-MECHANICAL BEHAVIOR OF EPOXY MATRIX COMPOSITES REINFORCED WITH RAMIE FIBERS

THE DYNAMIC-MECHANICAL BEHAVIOR OF EPOXY MATRIX COMPOSITES REINFORCED WITH RAMIE FIBERS

Authorship

Margem, Frederico Muylaert; Monteiro, Sergio Neves; Neto, Jarbas Bravo; Jesus, Rubén; Rodriguez, Sanchéz; Soares, Bluma Guenther

Margem, Frederico Muylaert

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Monteiro, Sergio Neves

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Neto, Jarbas Bravo

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Jesus, Rubén

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Rodriguez, Sanchéz

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Soares, Bluma Guenther

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DOI

10.5151/2594-5327-32390

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Abstract

The exceptional tensile strength of ramie fiber has motivated investigations on its application as reinforcement in polymeric composites. In this study the temperature variation of the dynamic- mechanical parameters of epoxy matrix composites incorporated with up to 30% in volume of ramie fiber were investigated by DMA tests. The parameters were the storage modulus, loss modulus and tangent delta. The investigation was conducted in the temperature from 20 to 200°C in an equipment operating in its flexural mode at 1 Hz under nitrogen. The results showed that the incorporation of ramie fiber tends to increase the viscoelastic stiffness of the epoxy matrix. It was also observed sensible changes in the glass transition temperature and in the structure damping capacity when the fraction of fiber is increased in the composite. These results indicate that the molecular mobility of the epoxy resin is affected by interaction with ramie fibers in the composite.

The exceptional tensile strength of ramie fiber has motivated investigations on its application as reinforcement in polymeric composites. In this study the temperature variation of the dynamic- mechanical parameters of epoxy matrix composites incorporated with up to 30% in volume of ramie fiber were investigated by DMA tests. The parameters were the storage modulus, loss modulus and tangent delta. The investigation was conducted in the temperature from 20 to 200°C in an equipment operating in its flexural mode at 1 Hz under nitrogen. The results showed that the incorporation of ramie fiber tends to increase the viscoelastic stiffness of the epoxy matrix. It was also observed sensible changes in the glass transition temperature and in the structure damping capacity when the fraction of fiber is increased in the composite. These results indicate that the molecular mobility of the epoxy resin is affected by interaction with ramie fibers in the composite.

Keywords

Ramie fibers, Epoxy composites, DMA.

Ramie fibers, Epoxy composites, DMA.