A Robust and High Self‐Healing Efficiency Poly(Urea‐Urethane) Based on Disulfide Bonds with Cost‐Effective Strategy

Front Cover: In article number 1900340 by Guosheng Hu and co-workers, a self-healing poly(urea-urethane) is prepared based on disulfide bonds with a cost-effective strategy. The poly(urea-urethane) presents an excellent selfhealing capability with self-healing efficiency of 95.3% and high tensile strength up to 25.80 MPa. This strategy provides an available idea to develop robust self-healing polymer materials cost-effectively.