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《高分子科学(英文版)》 2016-10
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Synthesis and Characterization of Crystallizable Aliphatic Thermoplastic Poly(ester urethane) Elastomers through a Non-isocyanate Route

Yue Li;Su-qing Li;Jing-bo Zhao;Zhi-yuan Zhang;Jun-ying Zhang;Wan-tai Yang;Key Laboratory of Carbon Fiber and Functional Polymers(Beijing University of Chemical Technology),Ministry of Education;State Key Laboratory of Chemical Resource Engineering,College of Materials Science and Engineering,Beijing University of Chemical Technology;  
A simple non-isocyanate route is developed for synthesizing crystallizable aliphatic thermoplastic poly(ester urethane) elastomers(TPEURs) with good thermal and mechanical properties. Three prepolymers of1,6-bis(hydroxyethyloxycarbonylamino) hexane(BHCH), i.e. Pre PBHCHs, were prepared through the self-transurethane polycondensation of BHCH. A poly(butylene adipate) prepolymer(Pre PBA) with terminal HO― groups was prepared and used as a polyester glycol. A series of TPEURs were prepared by the co-polycondensation of the Pre PBHCHs with Pre PBA at 170 ℃ under a reduced pressure of 399 Pa. The TPEURs 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. The TPEURs exhibited M_n up to 23300 g/mol, M_w up to 51100 g/mol, Tg ranging from-33.8 ℃ to-3.1 ℃, T_m from 94.3 ℃ to 111.9 ℃, initial decomposition temperature over 274.7 ℃, tensile strength up to18.8 MPa with a strain at break of 450.0%, and resilience up to 77.5%. TPU elastomers with good crystallization and mechanical properties were obtained through a non-isocyanate route.
【Fund】: financially supported by the National Natural Science Foundation of China(Nos.21244006 and 50873013)
【CateGory Index】: TQ334.1
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