Abstract Carbon fiber reinforced polymer (CFRP) composites were fabricated using a novel intrinsically healable isocyanurate-oxazolidone (ISOX) thermosetting matrix. After multiple delamination events, repeatable strength recovery of the composites has been demonstrated with a first healing efficiency up to 85% after thermal treatment. The healing mechanism results from transformation of the isocyanurate with epoxide groups to yield new oxazolidone rings at the fracture surface. This novel ISOX polymer utilizes commercial diglycidyl ether of bisphenol F (DGEBF) and toluene diisocyanate to produce a high cross-link density thermoset with a glass transition temperature (Tg) up to 285 °C, and 99.5% of the composite weight remains at 300 °C. The strength and stiffness of the composites are comparable with an engineering grade polymer matrix composite typically used in aerospace applications and the thermal stability places the materials in the polybismaleimide performance region although with greater toughness. This polymer exhibits the highest Tg of any self-healing material reported and is composed of low cost reactants, which gives the polymer great potential to function as a major component of an advanced structural composite for extreme environments.

中文翻译：

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具有高玻璃化转变温度的新型自修复 CFRP 复合材料

摘要 碳纤维增强聚合物 (CFRP) 复合材料是使用新型本征可愈合异氰脲酸酯-恶唑烷酮 (ISOX) 热固性基质制造的。在多次分层事件后，复合材料的强度恢复可重复，热处理后的首次愈合效率高达 85%。愈合机制源于异氰脲酸酯与环氧基团的转化，在断裂表面产生新的恶唑烷酮环。这种新型 ISOX 聚合物利用双酚 F (DGEBF) 和甲苯二异氰酸酯的商业二缩水甘油醚生产玻璃化转变温度 (Tg) 高达 285 °C 的高交联密度热固性材料，并且 99.5% 的复合材料重量保持在 300 ℃。复合材料的强度和刚度与通常用于航空航天应用的工程级聚合物基复合材料相当，热稳定性使材料处于聚双马来酰亚胺性能区域，但具有更高的韧性。这种聚合物在报道的任何自修复材料中表现出最高的 Tg，并且由低成本的反应物组成，这使得该聚合物具有巨大的潜力，可以作为用于极端环境的先进结构复合材料的主要成分。