Synthesis and Properties of Non-isocyanate Crystallizable Aliphatic Thermoplastic Polyurethanes

作     者：LI Suqing DENG Yong ZHAO Jingbo ZHANG Zhiyuan ZHANG Jnuying YANG Wantai 李素卿;DENG Yong;赵京波;ZHANG Zhiyuan;ZHANG Junying;YANG Wantai

作者机构：Key Laboratory of Carbon Fiber and Functional Polymers（Bering University of Chemical Technology）Ministry of Educatio State Key Laboratory of Chemical Resource EngineeringCollege of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2018年第33卷第5期

页      面：1275-1280页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：Funded by the National Natural Science Foundation of China(Nos.21244006 and 50873013) the Beijing Natural Science Foundation(No.2182056) 

主　　题：thermoplastic polyurethanes non-isocyanate route transurethane polycondensation properties dimethyl 1 6-hexamethylene dicarbamate 

摘      要：A simple non-isocyanate route synthesizing thermoplastic polyurethanes（TPUs） with good thermal and mechanical properties is described. Melt transurethane polycondensation of dimethyl 1,6-hexamethylene dicarbamate with 1,4-butanediol and 1,6-hexanediol was conducted at different molar ratios under the catalysis of tetrabutyl titanate. A series of crystallizable non-isocyanate TPUs with high molecular weight were prepared. The TPUs were characterized by gel permeation chromatography, FT-IR, 1 H-NMR, differential scanning calorimetry, thermogravimetric analysis, wide angle X-ray diffraction, AFM, and tensile tests. The TPUs exhibited Mn ranging from 12 500 to 26 400 g/mol, Mw from 16 700 to 56 400 g/mol, Tm up to 151.4 °C, and initial decomposition temperature over 241.8 °C. Their tensile strength reached 42.99 MPa with a strain at break of 30.00%. TPUs constructed simply with butylene, hexylene, and urethane linkages were successfully synthesized through a non-isocyanate route.