Comparative analysis of structural, thermal, and electrical characteristics of virgin and recycled polyester yarns

Abstract

This study presents a comprehensive comparison between virgin and recycled polyester yarns in both filament and staple forms, focusing on their mechanical, electrical, thermal, and structural properties. Yarn samples produced from mechanically recycled PET bottles and virgin polyester were evaluated in terms of tensile strength, elongation, and surface resistivity. In addition, thermal behavior was analyzed using thermogravimetric analysis (TGA), and crystallinity was examined through X-ray diffraction (XRD). The results showed that recycled polyester yarns exhibited lower tensile strength but higher elongation than virgin counterparts. Recycled samples also demonstrated lower surface resistivity, indicating better electrostatic dissipation characteristics. TGA revealed a lower decomposition temperature and higher residual mass in recycled samples, while XRD analysis confirmed reduced crystallinity compared to virgin polyester. These findings provide valuable insight into the performance characteristics of recycled polyester yarns and their suitability for various applications within sustainable textile production.