title: Enhancing mechanical performance of a covalent self-healing material by sacrificial noncovalent bonds.
abstract: Polymers that repair themselves after mechanical damage can significantly improve their durability and safety. A major goal in the field of self-healing materials is to combine robust mechanical and efficient healing properties. Here, we show that incorporation of sacrificial bonds into a self-repairable network dramatically improves the overall mechanical properties. Specifically, we use simple secondary amide side chains to create dynamic energy dissipative hydrogen bonds in a covalently cross-linked polymer network, which can self-heal via olefin cross-metathesis. We envision that this straightforward sacrificial bonding strategy can be employed to improve mechanical properties in a variety of self-healing systems.
authors: Department of Chemistry, University of California, Irvine, California 92697, United States.
authors: James A
authors: JA
authors: Neal
authors: Department of Chemistry, University of California, Irvine, California 92697, United States.
authors: Davoud
authors: D
authors: Mozhdehi
authors: Department of Chemistry, University of California, Irvine, California 92697, United States.
authors: Zhibin
authors: Z
authors: Guan
mesh_terms: D000577:Amides / Q000737:chemistry; D006860:Hydrogen Bonding; D055595:Mechanical Phenomena; D011108:Polymers / Q000737:chemistry*; D012212:Rheology; D013718:Tensile Strength
chemical_list: D000577:Amides; D011108:Polymers