To reduce the environmental footprint of the modern society, it is desirable to elongate the lifetime of consumer products, for example by implementing healable coatings and protective layers. However, since most healing processes carried out by heat or light suffer from material degradation, improving the robustness and integrity of healable materials is of tremendous importance to prolong their lifetime. In recent work, a prototype is created of a dynamic covalent polymer network, whose thermal healing ability can be switched “on” and “off” by light to provide a means to locally control repair of a damaged coating. Based on the initial concept, herein a new set of difunctional crosslinkers and linear polymers of various compositions is presented to form dynamic covalent polymer networks, in which the barrier for the retro Diels–Alder decrosslinking reaction is decreased. The approach results in lower healing temperatures and thus a longer lifetime of the material.

中文翻译：

---

降低光开关动态共价聚合物网络的修复温度

为了减少现代社会的环境足迹，期望例如通过实施可修复的涂层和保护层来延长消费产品的寿命。但是，由于大多数通过热或光进行的愈合过程都会受到材料降解的影响，因此，提高可修复材料的坚固性和完整性对​​于延长其使用寿命至关重要。在最近的工作中，创建了一种动态共价聚合物网络的原型，该原型的热修复能力可以通过光“打开”和“关闭”，以提供一种局部控制受损涂层修复的方法。基于最初的概念，此处提出了一组新的双官能度交联剂和各种组成的线性聚合物，以形成动态共价聚合物网络，其中减少了逆Diels-Alder交联反应的壁垒。该方法导致较低的愈合温度，从而使材料的寿命更长。