Supramolecular chemistry has provided versatile and affordable solutions for the design of tough, flexible polymers. However, application of supramolecular chemistry has been limited to the production of rigid, high-performance polymers due to weak segment mobility. This paper describes a new method of toughening rigid high-performance polymers using the synergistic effect between dual Cu2+ -coordination bonds as a crosslink. These dual Cu2+ -coordination cross-linked high-performance polymers are a class of rigid polymers with an outstanding combination of strength and toughness. The distinct lifetimes and binding strengths of the dual Cu2+ -coordination bonds in a rigid polymer network elicit different dynamic behaviors to improve its energy dissipation and mechanical properties. Moreover, the reformation and removal of Cu2+ -coordination bonds by pyrophosphoric acid endows these cross-linked high-performance polymers with recyclability.

中文翻译：

---

具有增强的强度-韧性组合的可回收和双重交联高性能聚合物。

超分子化学为硬质柔性聚合物的设计提供了通用且价格合理的解决方案。但是，由于弱的链段迁移率，超分子化学的应用仅限于生产刚性，高性能的聚合物。本文介绍了一种新的增韧刚性高性能聚合物的方法，该方法利用双Cu2 +配位键之间的协同效应作为交联键。这些双Cu2 +配位交联的高性能聚合物是一类刚性聚合物，具有强度和韧性的出色组合。刚性聚合物网络中双Cu2 +-配位键的独特寿命和结合强度引发了不同的动力学行为，从而改善了其能量耗散和机械性能。此外，