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Here we present a life\u2010cycle\u2010integrated molecular design strategy for circular epoxy resins based on a hindered phenylene biacetal architecture, overcoming the longstanding industrial trade\u2010offs between scalable synthesis, processability, high in\u2010service performance, chemical recyclability, and long\u2010term stability. The resins are prepared through one\u2010pot scalable synthesis (\u2265200\u00a0g), producing liquid monomers compatible with vacuum\u2010assisted resin infusion molding (VARI) with processing windows exceeding 60\u00a0min at 55\u00b0C. The resulting networks exhibit strong thermal\u2013mechanical properties (\n                    <jats:italic>T<\/jats:italic>\n                    <jats:sub>g<\/jats:sub>\n                    = 119\u00b0C\u2013136\u00b0C, tensile strength \u226572\u00a0MPa) and significantly improved impact resistance (+83% vs. commercial bisphenol A epoxy), together with excellent durability, including negligible creep at 180\u00b0C and stable properties after prolonged hygrothermal aging (60\u00b0C\/90% RH, 32 days). Dormant dynamic acetal linkages enable weak\u2010acid\u2010triggered deconstruction at room temperature, allowing 100% nondestructive carbon\u2010fiber recovery and &gt;80% recovery of high\u2010purity monomeric precursors. Artificial\u2010intelligence\u2010assisted life\u2010cycle assessment indicates a 45%\u201356% reduction in cradle\u2010to\u2010grave CO\n                    <jats:sub>2<\/jats:sub>\n                    emissions compared with conventional CFRP disposal, with a total resource reutilization\/upcycling rate exceeding 92%. This platform provides a practical pathway toward circular structural composites for net\u2010zero infrastructure.\n                  <\/jats:p>","DOI":"10.1002\/anie.9945235","type":"journal-article","created":{"date-parts":[[2026,4,22]],"date-time":"2026-04-22T05:26:16Z","timestamp":1776835576000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Life\u2010Cycle\u2010Integrated Molecular Design of Hindered Phenylene Biacetal Epoxies for Practical Recyclable Composite Applications"],"prefix":"10.1002","volume":"65","author":[{"given":"Shuai","family":"Du","sequence":"first","affiliation":[{"name":"Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University  Wuxi P. R. 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China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shanshan","family":"Dai","sequence":"additional","affiliation":[{"name":"Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University  Wuxi P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kangjun","family":"Sun","sequence":"additional","affiliation":[{"name":"Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University  Wuxi P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Changhui","family":"Jing","sequence":"additional","affiliation":[{"name":"Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University  Wuxi P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xin","family":"Wang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University  Wuxi P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fengyuan","family":"Zhang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University  Wuxi P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9652-1016","authenticated-orcid":false,"given":"Songqi","family":"Ma","sequence":"additional","affiliation":[{"name":"Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University  Wuxi P. R. 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