Abstract

The outstanding performance of conventional thermosets arising from their covalently cross-linked networks directly results in a limited recyclability. The available commercial or close-to-commercial techniques facing this challenge can be divided into mechanical, thermal, and chemical processing. However, these methods typically require a high energy input and do not take the recycling of the thermoset matrix itself into account. Rather, they focus on retrieving the more valuable fibers, fillers, or substrates. To increase the circularity of thermoset products, many academic studies report potential solutions which require a reduced energy input by using degradable linkages or dynamic covalent bonds. However, the majority of these studies have limited potential for industrial implementation. This review aims to bridge the gap between the industrial and academic developments by focusing on those which are most relevant from a technological, sustainable and economic point of view. An overview is given of currently used approaches for the recycling of thermoset materials, the development of novel inherently recyclable thermosets and examples of possible applications that could reach the market in the near future.

抽象的

常规热固性树脂的共价交联网络所具有的出色性能直接导致了其可回收性有限。面临这一挑战的可用商业或接近商业的技术可以分为机械，热处理和化学处理。然而，这些方法通常需要高能量输入，并且不考虑热固性基质本身的再循环。相反，他们专注于获取更有价值的纤维，填料或基材。为了增加热固性产品的圆度，许多学术研究报告了潜在的解决方案，这些解决方案要求通过使用可降解键或动态共价键来减少能量输入。但是，这些研究中的大多数在工业实施方面的潜力有限。这篇综述旨在通过从技术，可持续性和经济的角度关注最相关的发展来弥合工业发展与学术发展之间的差距。概述了目前用于热固性材料回收的方法，新型固有可回收热固性材料的开发以及可能在不久的将来进入市场的可能应用的示例。