Malleable thermosets are crosslinked polymers containing dynamic covalent bonds, which can be reversibly cleaved and reformed. They have attracted considerable attention in recent years due to their combined advantages of thermosets and thermoplastics. They have excellent mechanical properties and thermal and chemical stabilities like traditional thermosets yet are reprocessable and recyclable like thermoplastics. Although the chemical composition plays an important role in determining the mechanical and thermal properties of materials, the application of dynamic covalent chemistry is the key to achieving the unique properties of malleable thermosets. The mechanism of reversible bond cleavage and reformation, bond activation energies and kinetics, and the conditions triggering such reversibility define the malleable properties of the materials, how and why they can be reprocessed, and when the materials fail. In this review, we introduce fundamental concepts and principles of malleable thermosets, dynamic covalent chemistry, and the characteristic materials properties, including reprocessability, rehealability, and possible recyclability. We categorize the recent literature examples based on the underlying chemistry to demonstrate how dynamic covalent chemistry is exploited in malleable thermosets and how their malleable properties can be achieved and altered; we also discuss intriguing future opportunities based on such exploitation.

可延展的热固性材料是含有动态共价键的交联聚合物，可以可逆地裂解和重整。近年来，由于它们具有热固性塑料和热塑性塑料的共同优点，因此引起了相当大的关注。它们具有出色的机械性能以及热稳定性和化学稳定性，就像传统的热固性塑料一样，却可以像热塑性塑料一样进行再加工和回收利用。尽管化学成分在确定材料的机械和热性能方面起着重要作用，但动态共价化学的应用是获得可延展热固性材料独特性能的关键。可逆键断裂和重整的机理，键活化能和动力学以及触发这种可逆性的条件决定了材料的可延展性能，如何以及为什么可以对它们进行再加工，以及何时材料失效。在这篇综述中，我们介绍了可延展的热固性塑料，动态共价化学的基本概念和原理，以及材料的特性，包括可再加工性，可修复性和可能的​​可回收性。我们基于基础化学对最近的文献实例进行分类，以展示如何在可延展热固性材料中利用动态共价化学，以及如何实现和改变其可延展性。我们还将讨论基于此类开发的有趣的未来机会。可修复性，以及可能的可回收性。我们基于基础化学对最近的文献实例进行分类，以展示如何在可延展热固性材料中利用动态共价化学，以及如何实现和改变其可延展性。我们还将讨论基于此类开发的有趣的未来机会。可修复性，以及可能的可回收性。我们根据基础化学对最近的文献实例进行分类，以展示如何在可延展热固性材料中利用动态共价化学，以及如何实现和改变其可延展性。我们还将讨论基于此类开发的有趣的未来机会。