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Here, we present the selective chemical depolymerization of polycarbonate by employing a vanillin derivative as bio\u2010based feedstock. The resulting di\u2010vanillin carbonate monomer was used in combination with various amines to construct a library of reprocessable poly(imine\u2010carbonate)s, which show tailor\u2010made thermal and mechanical properties. These novel poly(imine\u2010carbonate)s exhibit excellent recyclability under acidic and energy\u2010efficient conditions. This allows the recovery of monomers in high yields and purity for immediate reuse, even when mixed with various commodity plastics. This work provides exciting new insights in the design of bio\u2010based circular polymers produced by upcycling of plastic waste with minimal environmental impact.<\/jats:p>","DOI":"10.1002\/anie.202211806","type":"journal-article","created":{"date-parts":[[2022,9,8]],"date-time":"2022-09-08T12:41:31Z","timestamp":1662640891000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":130,"title":["Closed\u2010Loop Recycling of Poly(Imine\u2010Carbonate) Derived from Plastic Waste and Bio\u2010based Resources"],"prefix":"10.1002","volume":"61","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2414-598X","authenticated-orcid":false,"given":"Keita","family":"Saito","sequence":"first","affiliation":[{"name":"Polymer Performance Materials Group Department of Chemical Engineering and Chemistry Eindhoven University of Technology  5600 MB Eindhoven The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5840-8952","authenticated-orcid":false,"given":"Fabian","family":"Eisenreich","sequence":"additional","affiliation":[{"name":"Polymer Performance Materials Group Department of Chemical Engineering and Chemistry Eindhoven University of Technology  5600 MB Eindhoven The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5797-4269","authenticated-orcid":false,"given":"Tankut","family":"T\u00fcrel","sequence":"additional","affiliation":[{"name":"Polymer Performance Materials Group Department of Chemical Engineering and Chemistry Eindhoven University of Technology  5600 MB Eindhoven The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7944-5728","authenticated-orcid":false,"given":"\u017deljko","family":"Tomovi\u0107","sequence":"additional","affiliation":[{"name":"Polymer Performance Materials Group Department of Chemical Engineering and Chemistry Eindhoven University of Technology  5600 MB Eindhoven The Netherlands"},{"name":"Institute for Complex Molecular Systems Eindhoven University of Technology  5600 MB Eindhoven The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2022,9,29]]},"reference":[{"key":"e_1_2_6_1_1","doi-asserted-by":"publisher","DOI":"10.1002\/cssc.202100904"},{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.aao6711"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1126\/sciadv.1700782"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201915651"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1002\/ange.201915651"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.xcrp.2021.100514"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.aat4997"},{"key":"e_1_2_6_7_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41570-017-0046"},{"key":"e_1_2_6_8_1","doi-asserted-by":"publisher","DOI":"10.1002\/pol.20190261"},{"key":"e_1_2_6_9_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.macromol.7b00293"},{"key":"e_1_2_6_10_1","doi-asserted-by":"publisher","DOI":"10.1039\/C8PY01284A"},{"key":"e_1_2_6_11_1","doi-asserted-by":"publisher","DOI":"10.1007\/s12649-019-00794-8"},{"key":"e_1_2_6_12_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41557-019-0249-2"},{"key":"e_1_2_6_13_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41586-020-03149-9"},{"key":"e_1_2_6_14_1","doi-asserted-by":"publisher","DOI":"10.1021\/acssuschemeng.8b02355"},{"key":"e_1_2_6_15_1","first-page":"e2022045","volume":"61","author":"Cederholm L.","year":"2022","journal-title":"Angew. 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