Sacrificial H-Bond Arrays Reinforce Dynamic Covalent Networks for Ultra-tough, Solvent-Resistant, and Self-healable Polyurethanes
Reconciling high toughness and solvent resistance with dynamic adaptability under mild conditions remains challenging for self-healable polymer networks. Here, we report a dual-dynamic polyurethane elastomer (PCL-ADH-FBR) in which an acylurea-derived, high-density hydrogen-bonding array is integrated with a dynamic b...