Influence of fiber hybridization on the dynamic mechanical properties of glass/ ramie fiber-reinforced polyester composites

摘要

This study aims to evaluate the influence of fiber hybridization and frequency on the dynamic mechanical properties of ramie/glass hybrid fiber-reinforced polyester composites. The storage modulus (￡'), loss modulus (￡") and damping behavior (tan 8) were evaluated as a function of different relative glass/ramie fiber volume ratios. For the storage modulus, the importance of the reinforcement effect above T_g was revealed. Also, the peak height, peak width at half-height and relaxation area were investigated for the loss modulus and tan 5 curves, showing the influence of a shoulder below T_g for each case. Finally, the tan 5 peak shifts to higher temperatures by increasing the frequency. Higher activation energy was observed for 75% glass fiber-containing composites.