Dual networks, containing Diels‐Alder (DA) based reversible and epoxy networks, are studied as self‐healing thermoset materials. The thermoreversible DA network acts as a healing agent at healing procedure and the epoxy network (E) keeps the material integrity. Two types of the dual networks are investigated, the interpenetrating networks (IPN) and the DA‐epoxy copolymers. The rate of bonds breaking and reformation is monitored by Fourier transform infrared spectroscopy and dynamic mechanical analysis. Two healing steps are followed: the sealing of the notch by microscopy and recovery of the structure by tensile tests. The factors governing the healing efficiency are determined and analyzed. The fraction of the sol generated at healing is found to be the crucial parameter. The novel architecture of the IPN with a high content of the DA network is designed. This IPN generates a high amount of the sol at healing and shows the healing efficiency approaching to 100%.

中文翻译：

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自修复环氧树脂和可逆Diels-Alder互穿网络

包含基于Diels-Alder（DA）的可逆和环氧树脂网络的双网络被研究为自修复热固性材料。热可逆DA网络在修复过程中充当治愈剂，而环氧网络（E）则可保持材料完整性。研究了两种类型的双重网络，互穿网络（IPN）和DA-环氧共聚物。通过傅立叶变换红外光谱法和动态力学分析监测键断裂和重整的速率。接下来的两个修复步骤是：通过显微镜对切口进行密封，并通过拉伸试验恢复结构。确定和分析控制愈合效率的因素。发现愈合时产生的溶胶分数是关键参数。设计了具有较高DA网络内容的IPN的新颖体系结构。该IPN在愈合时会生成大量溶胶，并显示出接近100％的愈合效率。