Polymers which contain 2-Amino-4-hydroxy-6-methylpyrimidine (UPy) usually show good self-healing capabilities under certain conditions. In this study, the UPy was grafted into the side chain of waterborne polyurethane (WBPU), which was synthesized from 4,4-diisocyanate dicyclohexylmethane (H₁₂MDI) and polycarbonate diol (PCDL), for giving the function of self-healing to the polymer. Meanwhile, the methylated β-cyclodextrin (M-β-CD), which was able to enhance the mechanical properties of WBPU and realize the synergistic effect between M-β-CD and UPy to raise the performance of self-healing, was introduced onto the main chain of WBPU. The T_g (glass transition temperature) of the polymer can be observed from dynamic mechanical property analysis (DMA) below room temperature, which facilitated the movement of the chain in self-healing process. From the tensile test, it showed that the cut polymer spline displayed a self-healing efficiency of 92.29% at 100 °C within 36 h. Furthermore, the disappearance of surface scratch of polymer film was observed by heating under a polarized microscope (POM) with a heating table. The results manifested that SWBPU exhibited great application as an intelligent response-type material.

包含2-氨基-4-羟基-6-甲基嘧啶（UPy）的聚合物通常在某些条件下显示出良好的自愈能力。在这项研究中，UPy被接枝到水性聚氨酯（WBPU）的侧链中，该聚氨酯由4,4-二异氰酸酯二环己基甲烷（H ₁₂ MDI）和聚碳酸酯二醇（PCDL）合成，从而赋予了自愈功能聚合物。同时，介绍了能够增强WBPU力学性能并实现M-β-CD与UPy协同作用以提高自愈性能的甲基化β-环糊精（M-β-CD）。 WBPU的主链。第t_克室温下的动态力学性能分析（DMA）可以观察到聚合物的玻璃化转变温度（玻璃化转变温度），这有助于链在自修复过程中的运动。从拉伸试验中可以看出，经切割的聚合物花键在100°C下36 h内显示出92.29％的自愈效率。此外，通过在具有加热台的偏光显微镜（POM）下加热，观察到聚合物膜表面划痕的消失。结果表明，SWBPU作为一种智能响应型材料具有广阔的应用前景。