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

作者：Ban, Jia-Long; Li, Su-Qing; Yi, Chen-Feng; Zhao, Jing-Bo^*; Zhang, Zhi-Yuan; Zhang, Jun-Ying

来源：Chinese Journal of Polymer Science, 2019, 37(1): 43-51.

DOI：10.1007/s10118-018-2165-0

• Non-isocyanate route
• Thermoplastic polyureas
• One-pot method
• Sustainable synthesis
• Transurethane polycondensation

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 degrees C for 6 h under normal pressure. Melt transurethane polycondensation was successively conducted at 170 degrees 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, H-1-NMR, differential scanning calorimetry, thermogravimetric analysis, wide-angle X-ray diffraction, atomic force microscopy, and tensile test. NI-TPUreas exhibited M-n of up to 1.67 x 10(4) g/mol, initial decomposition temperature over 290 degrees C, and tensile strength of up to 32 MPa. Several crystallizable NI-TPUreas exhibited T-m exceeding 98 degrees C. NI-TPUreas with good thermal and mechanical properties were prepared through a green and simple one-pot non-isocyanate route.

• 出版日期2019-1
• 单位北京化工大学