Citation: Jia-Long Ban, Su-Qing Li, Chen-Feng Yi, Jing-Bo Zhao, Zhi-Yuan Zhang, Jun-Ying Zhang. Amorphous and Crystallizable Thermoplastic Polyureas Synthesized through a One-pot Non-isocyanate Route[J]. Chinese Journal of Polymer Science, ;2019, 37(1): 43-51. doi: 10.1007/s10118-018-2165-0 shu

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

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, Beijing 100029, China

Corresponding author: Jing-Bo Zhao, zhaojb@mail.buct.edu.cn
Received Date: 27 April 2018
Revised Date: 23 May 2018
Accepted Date: 28 May 2018
Available Online: 4 July 2018

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 non-isocyanate thermoplastic polyureas (NI-TPUreas) were prepared. The NI-TPUreas were characterized by gel permeation chromatography, FTIR, ¹H-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 × 10⁴ g/mol, initial decomposition temperature over 290 °C, and tensile strength of up to 32 MPa. Several crystallizable NI-TPUreas exhibited T_m exceeding 98 °C. NI-TPUreas with good thermal and mechanical properties were prepared through a green and simple one-pot non-isocyanate route.
- Non-isocyanate route,
- Thermoplastic polyureas,
- One-pot method,
- Sustainable synthesis,
- Transurethane polycondensation
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