A Strong and Tough Thermosetting Epoxy Resin for Recyclable High‐Performance Composites

, effectively overcoming the long-standing trade-off between strength and toughness in thermosets. This balanced performance renders it a promising matrix for high-performance EP-CFRCs, which display a tensile strength of 718 MPa and a bending deflection of 0.59 mm. Moreover, the embedded tertiary amines accelerate transesterification reactions, enabling closed-loop recycling of EP-CFRCs in water. The recycled carbon fibers and the degraded matrix can be reused in new composites and adhesives. This work presents a simple yet effective strategy for designing epoxy resin-based composites that overcome the limitations of traditional matrices and support the development of recyclable advanced materials for diverse industrial applications.