Dynamic mechanical analysis of randomly oriented intimately mixed short banana/sisal hybrid fibre reinforced polyester composites

Fractographic evaluations carried out under scanning electron microscope (SEM) confirm the quantitative characterisation obtained from static and dynamic mechanical analysis. The Arrhenius relationship has been used to calculate the activation energy of the glass transition of the polyester. The highest activation energy was found in hybrid composite with volume ratio of banana and sisal as 3:1. A master curve was constructed based on time-temperature superposition principle. Finally, the experimental results were compared with theoretical predictions.