Self-healing thermoplastic elastomers based on reversible supramolecular or covalent bonding often suffer from low mechanical strength to compensate their molecular mobility in ensuring effective end-to-end contact during repair. Herein, we propose a new strategy for self-healing elastomers using dynamic ordered microphase as the self-healing motif. A series of polyacrylonitrile-co-poly(n-butyl acrylate) copolymer elastomers are prepared by simple free radical polymerization. These elastomers, within a certain range of comonomer ratios, exhibit remarkable self-healing capabilities in bulk form. The ever-maintained strength of the repaired elastomer is attributed to the retention of intrinsic material strength by the dynamic ordered phase, rather than relying on reversible bonding typical of traditional self-healing materials. As a result, these elastomers deliver exceptional stretchability, mechanical strength of 7.45 MPa (vs. original 7.25 MPa), and toughness of up to 14.9 MJ m^-3, in addition to complete healing within 3 h. The designed elastomers integrate rapid healing, high repaired strength and toughness, feasible preparation, and recyclability. The rather facile synthesis of these self-healing elastomers can be generalized to other deformable strength-required and fast healing-needed materials at low cost, showing great application potentials in new energy and wearable electronics.

中文翻译：

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通过无规共聚物的动态有序微相交联实现自修复热塑性弹性体


基于可逆超分子键或共价键的自修复热塑性弹性体通常具有较低的机械强度，以补偿其分子迁移率，以确保修复过程中有效的端到端接触。在此，我们提出了一种使用动态有序微相作为自修复基序的自修复弹性体的新策略。通过简单的自由基聚合制备了一系列聚丙烯腈-共聚（正丁基丙烯酸酯）共聚物弹性体。这些弹性体在一定的共聚单体比例范围内，在块状形式下表现出显著的自修复能力。修复后的弹性体始终保持的强度归因于动态有序阶段对材料固有强度的保留，而不是依赖于传统自修复材料典型的可逆粘合。因此，这些弹性体具有出色的拉伸性、7.45 MPa 的机械强度（原来为 7.25 MPa）和高达 14.9 MJ m ^-3 的韧性，此外还可以在 3 小时内完全愈合。设计的弹性体结合了快速愈合、高修复强度和韧性、可行的制备和可回收性。这些自修复弹性体相当简单的合成可以推广到其他需要变形强度和快速愈合的材料，成本低，在新能源和可穿戴电子产品中显示出巨大的应用潜力。