Fig. 2: Structure design.
From: Superstretchable, yet stiff, fatigue-resistant ligament-like elastomers

a Chemical structure design and scheme of the double-crosslinking structure. b Proposed mechanism for bond breakage and reformation during tensile stretching: I. Initial II. At small strain, Li+-O weak bonds can easily break, but it can reform once the stress is removed. III. At large strain, PMMA nanodomains break into smaller parts to further dissipate energy.