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However, permanent cross\u2010links pose crucial obstacles to be seamless. Here, merging interfaces via hybrid exchange reactions among different dynamic covalent bonds (including ester, urethane, thiourethane, boronic\u2013ester, and oxime\u2013ester linkages) is proposed, breaking the long\u2010lasting restriction that these widely used bonds only undergo self\u2010exchange reactions. Model compound studies are conducted to verify that hybrid exchange reactions occur. As demonstrations, different liquid crystal elastomers are tenaciously joined into coherent assemblies, with the desired biomimetic structures (e.g., flying fish containing stiff and flexible parts) and rare deformation modes (e.g., flower blooming upon both heating and cooling). Besides connecting polymers, hybrid exchange reactions also facilitate the creation of new materials through cross\u2010fusion of different polymers. In addition to the polymers used in this work, hybrid exchange reactions can be adapted to other polymers based on similar mechanisms and beyond. Besides shape\u2010shifting\u2010related areas (e.g., soft robots, flexible electronics, and biomedical devices), it may also foster innovation in other fields involving general polymers, as well as promote deeper understanding of dynamic covalent chemistry.<\/jats:p>","DOI":"10.1002\/adma.202202462","type":"journal-article","created":{"date-parts":[[2022,11,3]],"date-time":"2022-11-03T03:05:52Z","timestamp":1667444752000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":47,"title":["Merging the Interfaces of Different Shape\u2010Shifting Polymers Using Hybrid Exchange Reactions"],"prefix":"10.1002","volume":"35","author":[{"given":"Huan","family":"Liang","sequence":"first","affiliation":[{"name":"The Key Laboratory of Bioorganic Phosphorus Chemistry &amp; Chemical Biology (Ministry of Education) Department of Chemistry Tsinghua University  Beijing 100084 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