Self-healing synthetic polymers have attracted considerable scientific attention owing to their excellent durability and extended lifetimes. Among the categories of extrinsic and intrinsic self-healing, the intrinsic process is being focused on recently because it can realize rapid and reversible self-healing abilities and repeatability through dynamic chemical bonds. Intrinsic self-healing was categorized into two types: reversible covalent and non-covalent bonding, which include reversible cycloaddition reactions, exchange reactions, hydrogen interactions, and metal-ligand coordination interactions. This review focuses on recent studies about self-healing polyurethanes, which are known to exhibit remarkably high elasticity, high tensile strength, low-temperature resistance, and corrosion resistance. The various methods used for realizing efficient self-healing polyurethanes are also explored.

自修复合成聚合物由于其出色的耐用性和延长的使用寿命而引起了相当多的科学关注。在外在和内在自愈的类别中，内在过程最近受到关注，因为它可以通过动态化学键实现快速可逆的自愈能力和可重复性。内在自愈被分为两种类型：可逆共价键和非共价键，包括可逆的环加成反应、交换反应、氢相互作用和金属-配体配位相互作用。本综述侧重于最近关于自修复聚氨酯的研究，众所周知，聚氨酯具有非常高的弹性、高拉伸强度、耐低温和耐腐蚀性。