The design and preparation of thermoset materials with high degradation rate and excellent mechanical properties is challenging owing to conflicting attributes of degradability and mechanical properties. Herein, this study introduces an approach to synthesize thermoset materials combining rapid degradability, stability and excellent integrated mechanical properties. The degradable thermoset material is synthesized by using paraformaldehyde (PFA) and aromatic 4,4'-(1,3-phenylenedioxy) dianiline (TPE-R) as monomers via aldimine condensation. The degradation rate of thermoset material is significantly enhanced by adjusting the content of hemiaminal structure in hemiaminal dynamic covalent networks (HDCNs). The results demonstrate that the optimized thermoset material represents rapid degradability (4.25 h for totally degradation) at room temperature. Interestingly, the resin still maintains high tensile strength (120 MPa) and excellent thermal stability (T_d5% = 316 °C, T_g = 174 °C). The thermosetting resin with a combination of great mechanical properties and rapid degradability can be served as materials, which provides a new way to fabricate recyclable thermosetting composites.

由于降解性和机械性能的相互矛盾，具有高降解速率和优异机械性能的热固性材料的设计和制备具有挑战性。本文中，这项研究介绍了一种合成热固性材料的方法，该方法结合了快速降解性，稳定性和出色的综合机械性能。可降解的热固性材料是通过低聚甲醛（PFA）和芳族4,4'-（1,3-苯二氧基）二苯胺（TPE-R）作为单体通过醛亚胺缩合合成的。通过调节血友病动态共价网络（HDCN）中的血友病结构含量，可以显着提高热固性材料的降解率。结果表明，优化的热固性材料具有快速降解性（4。在室温下完全降解需要25小时。有趣的是，该树脂仍保持高拉伸强度（120 MPa）和出色的热稳定性（T_d5％  = 316°C，T _g  = 174°C）。具有良好机械性能和快速降解性的热固性树脂可以用作材料，这为制造可回收的热固性复合材料提供了一种新方法。