Thermal-Driven Self-Healing and Recyclable Waterborne Polyurethane Films Based on Reversible Covalent Interaction

By introducing novel stimuli-responsive Diels–Alder (DA) diol into polymer chains, a series of environmentally friendly, self-healing, and recyclable waterborne polyurethanes based on DA/retro-DA reactions (WPU-DA-x) were successfully prepared through a modified acetone process. The properties and appearance of the resultant WPU-DA-x latex were analyzed by considering particle size and zeta potential which show these dispersions with an...