The supplementary materials for the study on chemical recycling of mixed textile waste include figures, tables, and references. Figure S1 characterizes 100% polyester, 100% cotton, and 50/50 PolyCotton T-shirts using TGA, FTIR, DSC, XRD, and SEM. The polyester textile shows a single decomposition peak at 430°C, while cotton exhibits three peaks due to water loss, durable press degradation, and cotton decomposition. The 50/50 PolyCotton T-shirt shows peaks for both materials. FTIR analysis confirms the chemical structures of the samples. DSC reveals melting and decomposition peaks, with the 50/50 T-shirt showing a broad endothermic peak for water evaporation. XRD analysis shows crystallinity in the samples, with the 50/50 T-shirt showing reduced crystallinity. SEM micrographs confirm the structures of the textiles. Figure S2 shows TGA and DTG of pure textiles. Figure S3 shows SEM micrographs of pure textiles. Table S1 provides moisture content data. Figures S4–S18 present various analyses of the recycling process, including the effect of glycolysis on polyester and cotton, SEM micrographs of residues, chemical structures of dyes, and characterization of recovered materials. Tables S2–S4 provide additional data on XRF, flowrates, and cost distribution. References include studies on textile recycling, chemical recycling of polyester and cotton, and the environmental impact of fast fashion. The study highlights the potential of microwave-assisted glycolysis for the chemical recycling of mixed textile waste, with the goal of recovering valuable materials such as BHET and isolating cotton, nylon, and spandex. The process involves depolymerization, separation, and purification of the recovered materials. The study also discusses the challenges and opportunities in textile recycling, including the need for efficient and sustainable methods to reduce waste and environmental impact.The supplementary materials for the study on chemical recycling of mixed textile waste include figures, tables, and references. Figure S1 characterizes 100% polyester, 100% cotton, and 50/50 PolyCotton T-shirts using TGA, FTIR, DSC, XRD, and SEM. The polyester textile shows a single decomposition peak at 430°C, while cotton exhibits three peaks due to water loss, durable press degradation, and cotton decomposition. The 50/50 PolyCotton T-shirt shows peaks for both materials. FTIR analysis confirms the chemical structures of the samples. DSC reveals melting and decomposition peaks, with the 50/50 T-shirt showing a broad endothermic peak for water evaporation. XRD analysis shows crystallinity in the samples, with the 50/50 T-shirt showing reduced crystallinity. SEM micrographs confirm the structures of the textiles. Figure S2 shows TGA and DTG of pure textiles. Figure S3 shows SEM micrographs of pure textiles. Table S1 provides moisture content data. Figures S4–S18 present various analyses of the recycling process, including the effect of glycolysis on polyester and cotton, SEM micrographs of residues, chemical structures of dyes, and characterization of recovered materials. Tables S2–S4 provide additional data on XRF, flowrates, and cost distribution. References include studies on textile recycling, chemical recycling of polyester and cotton, and the environmental impact of fast fashion. The study highlights the potential of microwave-assisted glycolysis for the chemical recycling of mixed textile waste, with the goal of recovering valuable materials such as BHET and isolating cotton, nylon, and spandex. The process involves depolymerization, separation, and purification of the recovered materials. The study also discusses the challenges and opportunities in textile recycling, including the need for efficient and sustainable methods to reduce waste and environmental impact.