Mechanical adaptation drives out-of-equilibrium network reorganization and self-strengthening in adapt-ring networks.

Adapt-ring networks (ARNs) mechanically trained under stress show up to an order-of-magnitude increases in Young’s modulus, tensile strength, fracture energy, and fatigue threshold.

• Why it matters: Synthetic polymer networks usually cannot autonomously remodel and strengthen while retaining a mechanical “memory,” limiting bio-inspired adaptive materials under changing loads.
• What they did: ARNs combine a covalent polyethylene glycol network with strain-directed reconfigurable α-cyclodextrin crystalline domains that fragment, translocate, and align into kinetically trapped architectures.
• The result: Mechanical training enhances multiple mechanical metrics up to an order of magnitude and is fully reversible via solvent-induced crystalline-domain reformation, enabling spatially resolved, 3D-printable reinforcement.

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