Fig. 1. Molecular design of the PDMS–SS–IP–BNB elastomer with high toughness, stretchability, and universally autonomous self-healing ability.

a Chemical structure of PDMS–SS–IP–BNB. b The proposed ideal structure of the supramolecular polymer network based on strong crosslinking H-bonds (BNB–BNB), weak crosslinking H-bonds (IP–IP, IP–BNB, IP–SS), and disulfide metathesis (S–S). c The synergistic interaction of multiple dynamic bonds contributes to universally self-healing capability of elastomer.