From Polymers to Rings and Back Again: Chemical Recycling of Polyesters to Macrolactones.

• Tác giả: Ryan W F Kerr, Thomas M McGuire, Madeleine L Smith, Charlotte K Williams
• Ngôn ngữ: eng
• Ký hiệu phân loại: 785.13 *Trios
• Thông tin xuất bản: Germany : Angewandte Chemie (International ed. in English) , 2025
• Bộ sưu tập: NCBI
• ID: 694899

Tóm tắt

 Cyclic anhydride and epoxide ring-opening copolymerization is a versatile and controlled route to make polyesters, gaining attention in different application sectors but so far the chemical recycling of these polyesters to cyclic monomers is under-explored. Here, the catalytic chemical recycling of aliphatic polyesters to selectively form 16- and 18-membered lactones is presented. The recycling reactions are catalysed using commercial tin octoate and conducted in the polymer melt (230 °C) resulting in high conversions to the macro-lactones (>
 90%). The recycled macro-lactones undergo catalysed ring-opening polymerizations to produce polyesters with equivalent properties to the virgin materials.