Covalent adaptable networks (CANs) have recently received extensive interests due to their reprocessability and repairability. Rethinking the libraries of the published CANs, most of them are fabricated by one/two-component reactions and few cases utilize multi-component reactions to construct CANs while multi-component reactions are conductive to tailoring the properties of polymers due to their structural designability and flexible choice of raw materials. A novel kind of dynamic covalent bond named aminoesterenamide is presented through three-component reaction between acetoacetyl, amine and isocyanate. Aminoesterenamide exhibits thermal reversibility through dissociating into vinylogous urethane and isocyanate. When it is used to prepare CANs, the synthesized polymer networks can be reprocessed many times via the exchange reaction between aminoesterenamides. Moreover, the forming of aminoesterenamide involving three starting components imparts CANs with great freedom to tailor their properties. Therefore, the authors believe this method that utilizes three-component reaction to fabricate CANs would bring new stories and perspectives to the exploration of new types of CANs.

中文翻译：

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通过三组分反应实现的氨基酯酰胺朝向以极大的自由度定制共价适应性网络

共价自适应网络（CAN）由于其可再加工性和可修复性，最近受到了广泛的关注。重新思考已发表的 CAN 库，它们中的大多数是通过一/二组分反应制造的，很少有案例利用多组分反应来构建 CAN，而多组分反应由于其结构可设计性和灵活选择原材料。通过乙酰乙酰基、胺和异氰酸酯的三组分反应，提出了一种新型的动态共价键氨基酯酰胺。氨基酯酰胺通过分解成乙烯基氨基甲酸酯和异氰酸酯而表现出热可逆性。当它用于准备 CAN 时，合成的聚合物网络可以通过氨基酯烯酰胺之间的交换反应进行多次再加工。此外，涉及三种起始成分的氨基酯酰胺的形成赋予 CAN 以极大的自由度来定制其特性。因此，作者认为这种利用三组分反应制造CAN的方法将为探索新型CAN带来新的故事和视角。