Strategic weakening for holistic strengthening: overstrain-driven synchronous strengthening-toughening in sustainable rubber via “weak” non-covalent networks

. Notably, 4U1N-2 retains substantial mechanical properties after reprocessing, exhibiting performance that exceeds the original properties of most reprocessable rubbers. Moreover, it demonstrates outstanding self-healing capabilities, with strength and elongation at break recovering to 88% and 85%, respectively. This work pioneers a "strategic weakening for holistic strengthening" principle, providing a universal framework for designing high-performance, sustainable elastomers.