Synthesis and properties of non-isocyanate thermoplastic polyurethanes containing dibutylene terephthalate units
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- 作者：Guoliang Wang ; Xiaokai Yuan ; Jingbo Zhao ; Zhiyuan Zhang…
- 关键词：Non ; isocyanate route ; Thermoplastic polyurethanes ; Bis (4 ; hydroxybutyl) terephthalate ; Transurethane polycondensation
- 刊名：Journal of Polymer Research
- 出版年：2016
- 出版时间：January 2016
- 年：2016
- 卷：23
- 期：1
- 全文大小：1,488 KB
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Xiaokai Yuan (1)
Jingbo Zhao (1)
Zhiyuan Zhang (1)
Junying Zhang (1)
Wantai Yang (1)
1. 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, Beijing, 100029, China - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Polymer Sciences
Industrial Chemistry and Chemical Engineering
Characterization and Evaluation Materials - 出版者：Springer Netherlands
- ISSN：1572-8935
文摘
Bis (4-hydroxybutyl) terephthalate (BHBT) was synthesized from the condensation of dimethyl terephthalate with excessive 1,4-butanediol. Transurethane polycondensation of 1,6-bis (hydroxyethyloxy carbonyl amino) hexane (BHCH) with BHBT at different BHCH/BHBT molar ratios was carried out at 170 掳C under a reduced pressure of 3 mmHg for different time. A series of non-isocyanate thermoplastic polyurethanes (NI-TPUs) containing dibutylene terephthalate units were prepared. The NI-TPUs were characterized by gel permeation chromatography, FT-IR, 1H-NMR, differential scanning calorimetry, thermogravimetric analysis, wide angle X-ray scattering, and tensile test. The NI-TPUs exhibited M n above 14200, M w above 19700, T g between 25.1 and 35.1 掳C, T m from 123.8 掳C to 141.1 掳C, initial decomposition temperature over 251.7 掳C, and tensile strength up to 37.89 MPa with a strain at break of 475.28 %. NI-TPUs with high T m, good tensile strength and good toughness were prepared. Introduction of dibutylene terephthalate units improved the mechanical properties obviously. Some urea linkages were formed during transurethane polycondensation because of the back-biting side reaction the -HNCOOCH2CH2OH terminal groups. Keywords Non-isocyanate route Thermoplastic polyurethanes Bis (4-hydroxybutyl) terephthalate Transurethane polycondensation