In this paper, a series of small monomers were synthesized to explore the dynamic reversible properties of phenol-carbamate bonds (PCBs), and the bimolecular exchange mechanism of PCBs was verified. Based on this mechanism, a novel thermo-healing recyclable epoxy resin with high mechanical performance and shape memory function was successfully developed. Meanwhile, the number of reversible phenol-carbamate bonds in this system was increased by molecular structure design, which increased the chance of reversible cleavage and recombination of the dynamic covalent bonds. Compared with our previous work, the thermo-healing efficiency of the epoxy thermosets was greatly increased, and the target polymer achieved an excellent balance between high thermo-healing efficiency and good mechanical performance. Further post-treatment experiments show that the cured epoxy resin can also be well recycled by solvent degradation or hot-pressing process. What's more, a novel carbon fiber (CF) reinforced polymer composite material was synthesized by taking that prepared epoxy thermoset as a matrix, which greatly improve the mechanical properties of epoxy resin, and the CF cloths can be recycled when the epoxy resin is removed by chemical degradation. In addition, due to the existence of reversible crystallizable switching segments in the epoxy resin system, when the temperature is above its T_g, it can be triggered by thermal energy, so that the film can rapidly recover from the temporary shape to the permanent shape. This study also provides a new direction for the development of novel multifunctional intelligent polymers.

本文合成了一系列小单体，探索苯酚-氨基甲酸酯键（PCBs）的动态可逆性质，验证了PCBs的双分子交换机制。基于该机理，成功开发出一种具有高机械性能和形状记忆功能的新型热修复可回收环氧树脂。同时，通过分子结构设计，增加了体系中可逆苯酚-氨基甲酸酯键的数量，增加了动态共价键可逆断裂和重组的机会.与我们之前的工作相比，环氧热固性材料的热修复效率大大提高了，并且目标聚合物在高热修复效率和良好的机械性能之间取得了良好的平衡。进一步的后处理实验表明，固化后的环氧树脂还可以通过溶剂降解或热压工艺得到很好的回收利用。此外，以制备的环氧热固性材料为基体，合成了一种新型碳纤维（CF）增强聚合物复合材料，大大提高了力学性能_g时，可通过以下方式触发：热能，使薄膜能迅速从临时形状恢复到永久形状。该研究也为新型多功能智能聚合物的开发提供了新的方向。