Amorphous and Crystallizable Thermoplastic Polyureas Synthesized through a One-pot Non-isocyanate Route

作     者：Jia-Long Ban Su-Qing Li Chen-Feng Yi 赵京波 Zhi-Yuan Zhang Jun-Ying Zhang Jia-Long Ban;Su-Qing Li;Chen-Feng Yi;Jing-Bo Zhao;Zhi-Yuan Zhang;Jun-Ying Zhang

作者机构：Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology) Ministry of Education College of Materials Science and Engineering Beijing University of Chemical Technology 

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

年 卷 期：2019年第37卷第1期

页      面：43-51,1-3页

核心收录：

学科分类：07[理学] 0703[理学-化学] 

基　　金：financially supported by the National Natural Science Foundation of China (No. 21244006) Beijing Natural Science Foundation (No. 2182056) 

主　　题：Non-isocyanate route Thermoplastic polyureas One-pot method Sustainable synthesis Transurethane polycondensation 

摘      要：A simple one-pot non-isocyanate route for synthesizing thermoplastic polyureas is presented. In situ urethanization was conducted from the ring-opening reaction of ethylene carbonate with poly(propylene glycol) bis(2-aminopropyl ether) and hexanediamine,m-xylylenediamine, or diethylene glycol bis(3-aminopropyl) ether at 100 °C for 6 h under normal pressure. Melt transurethane polycondensation was successively conducted at 170 °C under a reduced pressure of 399 Pa for different time periods. A series of nonisocyanate thermoplastic polyureas(NI-TPUreas) were prepared. The NI-TPUreas were characterized by gel permeation chromatography,FTIR, 1 H-NMR, differential scanning calorimetry, thermogravimetric analysis, wide-angle X-ray diffraction, atomic force microscopy,and tensile test. NI-TPUreas exhibited Mn of up to 1.67 × 104 g/mol, initial decomposition temperature over 290 °C, and tensile strength of up to 32 MPa. Several crystallizable NI-TPUreas exhibited Tm exceeding 98 °C. NI-TPUreas with good thermal and mechanical properties were prepared through a green and simple one-pot non-isocyanate route.