Recyclable and Dual Cross-Linked High-Performance Polymer with an Amplified Strength-Toughness Combination
Recyclable and Dual Cross-Linked High-Performance Polymer with an Amplified Strength-Toughness Combination
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可回收的双交联高性能聚合物及其增强韧性组合
DOI：
10.1002/marc.201900606
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发表时间：
2020-01-31
影响因子：
4.6
通讯作者：
Chang, Guanjun
中科院分区：
文献类型：
--
作者：
Du, Mengqi;Yang, Li;Chang, Guanjun
超分子化学为设计坚韧、柔韧的聚合物提供了通用且经济的解决方案。然而，超分子化学的应用已被限制在刚性，高性能聚合物的生产，由于弱链段的流动性。本文介绍了一种利用双Cu ~（2+）配位键之间的协同效应作为交联剂增韧刚性高性能聚合物的新方法。这些双Cu 2+配位交联高性能聚合物是一类刚性聚合物，具有出色的强度和韧性。在刚性聚合物网络中的双Cu 2+配位键的不同的寿命和结合强度引起不同的动力学行为，以改善其能量耗散和机械性能。此外，通过焦磷酸对Cu ~（2+）配位键的重新形成和去除，赋予这些交联高性能聚合物可回收性。
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.