Solvent-Free Synthesis of Self-Healable and Recyclable Crosslinked Polyurethane Based on Dynamic Oxime-Urethane Bonds

作     者：Yuepeng Wang Lei Yang Luzhi Zhang Hongfei Huang Bo Qian Shijia Gu Zhengwei You Yuepeng Wang;Lei Yang;Luzhi Zhang;Hongfei Huang;Bo Qian;Shijia Gu;Zhengwei You

作者机构：State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsInstitute of Functional MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China 

出 版 物：《Chinese Journal of Polymer Science》 (高分子科学（英文版）)

年 卷 期：2023年第41卷第11期

页      面：1725-1732,I0007页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：the National Key Research and Development Program of China(No.2021YFC2101800) the National Natural Science Foundation of China(Nos.52173117 and 21991123) the Natural Science Foundation of Shanghai(No.20ZR1402500) Belt&Road Young Scientist Exchanges Project of Science and Technology Commission Foundation of Shanghai(No.20520741000) Ningbo 2025 Science and Technology Major Project(No.2019B10068) the Science and Technology Commission of Shanghai(No.20DZ2254900) 

主　　题：Polyurethane Dynamic covalent bonds Oxime-urethane bonds Self-healing Recycle 

摘      要：Polyurethane is widely used for its versatility in design and range of ***-healing and recyclable dynamic polyurethane networks have attracted extensive attention due to their potential to extend service life and ensure safety in use,as well as to promote sustainable use of *** green and environment-friendly methods to obtain this material is an interesting and challenging task,as the majority of current dynamic polyurethane networks utilize the solution polymerization *** use of solvents makes the processes complicated,harmful to environment,and increase the ***(oxime-urethanes)(POUs)are emerging dynamic polyurethanes and show great potential in diverse fields,such as biomaterials,hot melt adhesives,and flexible *** this study,we utilized the solubility properties of dimethylglyoxime in raw material poly(ethylene glycol)to prepare POUs through bulk polymerization for the first *** method is simple,convenient and ***,copper ion coordination improves POUs strength and dynamic properties,with mechanical strength up from 0.54 MPa to 1.03 MPa and self-healing recovery rate up from 85.5%to 91.8%,and activation energy down from 119.6 k J/mol to 95.4 k J/*** demonstrate the application of this technology,self-healing and stretchable circuits are constructed from this dynamic polyurethane network.