Covalent adaptable networks (CANs) are polymer systems in which the crosslinks can undergo reversible rearrangement reactions. The stimuli-triggered dynamism of the network enables healing and reprocessing of pristine materials without damaging their original mechanical properties. In this paper, we show that thiourethane linkage is a promising dynamic covalent bond to create self-healable, injectable and recyclable polythiourethane (PTU) networks. Three different crosslinked PTU networks are thoroughly compared to understand the key features that influence the thermal reversibility of thiourethane moieties. FTIR and rheological measurements confirmed the underlying dissociative exchange mechanism. Finally, thermal recycling, self-healing and injectability of S-aromatic PTU are demonstrated.

共价适应性网络（CAN）是聚合物系统，其中的交联可发生可逆的重排反应。网络的激发动力使原始材料得以修复和再加工，而不会破坏其原始机械性能。在本文中，我们表明，硫代氨基甲酸酯键是一个有前途的动态共价键，可创建可自我修复，可注射和可回收的聚硫代氨基甲酸酯（PTU）网络。彻底比较了三种不同的交联PTU网络，以了解影响硫代氨基甲酸酯基团热可逆性的关键特征。FTIR和流变学测量证实了潜在的解离交换机制。最后，证明了S-芳族PTU的热循环，自修复和可注射性。