Comparative Dielectric Analyses of Hybrid Frayed Cotton Fibers Reinforced Unsaturated Polyester

This study focuses on the use of waste hybrid cotton fibers, provided by the textile industry, as reinforcement in unsaturated polyester composites. Hence, to evaluate the performance of white yarns and indigo denim fabrics on the recycled cotton fibers adhesion in unsaturated polyester matrix, dielectric measurements were performed in the temperature range 0–150 ℃ and the frequency range 0.1 Hz–1 MHz on two UP composites (#1 and #2) whose white yarns/indigo denim fabrics relative volume fractions were 1:3 and 1:1, respectively. This dielectric study revealed a better reinforcement/matrix adhesion occurred for the relative volume fraction 1:3. This dielectric analysis was in accordance with thermal and vibration ones based on differential scanning calorimeter (DSC) and FT-IR technique, respectively.