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Recycling is the most valuable method for polymer waste management. This study presents an efficient approach for the chemical recycling of polyethylene terephthalate (PET) waste, and it is utilized in high-performance applications. PET was depolymerized through the glycolysis method to produce bis-2-hydroxyethylene terephthalate (BHET), which was used in the synthesis of unsaturated polyester resin (UPR). Simultaneously, a tetrafunctional epoxy resin was synthesized by used of hydroquinone, formaldehyde, and epichlorohydrin. The glycolyzed PET products (BHET), UPR, and hydroquinone-based tetrafunctional epoxy resin were characterized by different analysis methods such as viscosity, acid value, epoxy equivalent weight, FT-IR, 1H-NMR, and gel permeation chromatography (GPC). UPR and tetrafunctional epoxy resin-based carbon fiber reinforced composites were prepared. The thermal, mechanical, chemical, and morphological properties of the prepared composites were investigated by using TGA, FESEM, EDX, AFM, tensile tests, flexural strength tests, Izod impact testing, Rockwell hardness, and chemical resistance analysis. The results are demonstrating the potential of recycled PET-derived materials in advanced composite applications, contributing to sustainable materials development and high-value waste management solutions.
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Raj et al. (2026) studied this question.
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