| Self-healing material has been much more attention for decades as a smart material,it has been a new subject as important part of supromolecular science since the first successful synthesis of self-healing material.The hydrogen bonds system has a more attention because of its excellent self-healing property at room temperature.However the application is limited with low tensile strength.It is a main method of introducing the covalent networks into the supramolecular system,but the drawback is the strength would be decreased.therefore,it is the key to choose a proper cross-linking agent to accomplish excellent properties.In this work,the oligomer were synthesized by sebacic acid,itaconic acid and diethylenetriamine(DETA)firstly.Then itaconic acid reacted with acrylamide via co-polymerization,the obtained product was subsequently reacted with urea.In consequence,this novel materials was obtained after treatment.The analysis indicated that the system composed of linear amide chains,monoalkyl-urea and imidazolidone groups using FT-IR、1H-NMR.The DSC and XRD characterized the system was a two-phase structure when itaconic acid is lower.With the content of itaconic acid raised,the crystalline disappeared and the system was an amorphous phase.The tensile strength promoted after cross-linking compared to linear-chain systems.Moreover,the self-healing property can reach 100%after 12 hours. |
