The dynamic-mechanical behavior of epoxy matrix composites reinforced with ramie fibers

Materia

Soares, Bluma Guenther¹  Bravo Neto, Jarbas²  Monteiro, Sergio Neves²  Rodriguez, Rubén Jesus Sanchéz²  Margem, Frederico Muylaert² 

[1] Federal University of Rio de Janeiro, Brazil;State University of the Northern Rio de Janeiro, Campos dos Goytacazes, Brazil

关键词: Ramie fiber;    mechanical tests;    composite.;   

DOI  :  10.1590/S1517-70762010000200012

学科分类：工程和技术（综合）

来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia

【 摘 要 】

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 structure damping capacity when the fraction of fiber is increased in the composite. These results indicate that the segmental mobility of the epoxy chains is affected by interaction with ramie fibers in the composite.

【 授权许可】

CC BY