Thermally Reversible,Self-Healing Polyurethane Based on Propyl Gallate and Polyurethane Prepolymers with Varied Isocyanate Content  

作　　者：Haiyang Ding Xiaohua Yang Lina Xu Shouhai Li Jianling Xia Mei Li 

机构地区：[1]Institute of Chemical Industry of Forest Products(ICIFP),Nanjing,210042,China [2]Key Laboratory of Biomass Energy and Material,Nanjing,210042,China [3]National Engineering Laboratory for Biomass Chemical Utilization,Nanjing,210042,China [4]Key and Open Laboratory on Forest Chemical Engineering,SFA,Nanjing,210042,China [5]Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University,Nanjing,210042,China

出　　处：《Journal of Renewable Materials》2020年第1期1-11,共11页可再生材料杂志（英文）

基　　金：supported by the National Natural Science Foundation of China.(Grand No.31570563);Jiangsu Province Biomass Energy and Materials Laboratory,China(Grant No.JSBEM-S-201807);Fundamental Research Funds of Chinese academy of forestry(CAFYBB2017MB017).

摘　　要：Thermosetting polyurethanes are widely used in various fields owing to their excellent elasticity,strength and solvent resistance.Three environmental friendly propyl gallate-based self-healing polyurethanes were prepared from polyurethane prepolymers with varying isocyanate content.The thermal stabilities of the polyurethanes were tested using thermogravimetric analysis.Their self-healing and mechanical properties were analyzed using a universal testing machine and dynamic thermomechanical analysis.The polyurethanes were found with high self-healing ability and excellent mechanical properties due to the absence of phenolic carbamate.These qualities improved with increased isocyanate content and the prolonged selfhealing time.We found,therefore,that the propyl gallate-based polyurethane has potential for use in industrial applications as self-healing materials.

关 键 词：Propyl gallate thermosetting polyurethane self-healing ability mechanical property 

分 类 号：O63[理学—高分子化学]