Advanced Vitrimer with Spiropyran Beads: A Multi‐Responsive, Shape Memory, Self‐Healing, and Reprocessable Smart Material (Small 12/2025)

Smart Materials Epoxy vitrimers, based on dynamic covalent bonds, offer a recyclable alternative to traditional thermosets. In article number 2407022, Sung-Kon Kim, Jaewoo Kim, Yong-Seok Choi, and co-workers develop a self-healing and mechano-responsive vitrimer using epoxide spiropyran beads, enabling crack self-reporting via color or fluorescent changes. The vitrimer effectively exhibits additional properties, including shape memory, reconfiguration and reprocessability. Its smart properties suit applications like sensors, actuators, 4D printing, and safety diagnostics.