A Highly Stretchable Self‐Healing Poly(dimethylsiloxane) Elastomer with Reprocessability and Degradability

Abstract It is a challenge to synthesize materials that possess the properties of high stretchability and self‐healability. Herein a new poly(dimethylsiloxane) elastomer with high stretchability, room‐temperature self‐healability, repeatable reprocessability, and controlled degradability is reported by incorporating an aromatic disulfide bond and imine bond. The as‐prepared elastomer can be stretched to over 2200% of its original length. Without external stimuli, a damaged sheet can completely heal in 4 h. In addition, the elastomer can be reprocessed multiple times without obvious performance degradation and degraded controllably by three ways. All these properties of the elastomer can be ascribed to the unique dual‐dynamic‐covalent sacrificial system.