Tough and transparent polyurethane networks with self-healing capability at mild temperature conditions were successfully prepared in a 1-pot procedure. The self-healing ability of synthesized polyurethane comes from the covalent disulfide metathesis and non-covalent H-bonding.The mechanical testing indicates that disulfide metathesis reforms the covalent bonds on a longer time scale, while H-bonding gives rise to a healing efficiency of around 46% in the early healing processing. The compromise between mechanical performance and healing capability is reached by tailoring the concentration of disulfide. The tensile strength of the sample with 100% self-heal efficiency can get to 5.01 MPa, which can be explained by higher mobility of polymer chain under ambient temperature from creep testing. In order to increase the tensile strength of self-healing elastomer, the hydrogen bonding effect received attention. H-bonding is a kind of noncovalent self-healing trending force; the supermolecular selfhealing elastomer based on H-bonding interaction was firstly developed by Leibler and colleagues. 16,17 Other researchers also have similar reports. 18,19 Although the self-healing effect of H-bonding is limited, the contribution to the self-healing cannot be ignored.This work focuses on obtaining a material with good mechanical properties and self-healing in 1-pot method by adapting the disulfide concentration. The self-healing contribution of disulfide metathesis and H-bonding effect of this system were investigated. To the best of our knowledge, disulfide self-healing assisted H-bonding selfhealing materials have not been systematically studied.2 | EXPERIMENTAL | MaterialsPolytetramethylene ether glycol (PTMEG) with a number average molecular weight of 2000 g·mol −1 was provided by Aladdin IndustrialCorporation and was degassed for more than 3 hours at 90°C.

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