The thermal self-healing properties of phenolic polyurethane derived from polyphenols with different substituent groups
The thermal self-healing properties of phenolic polyurethane derived from polyphenols with different substituent groups
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不同取代基多酚酚醛聚氨酯的热自修复性能
DOI：
10.1002/app.47039
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发表时间：
2019-02-10
影响因子：
3
通讯作者：
Huang, Kun
中科院分区：
文献类型：
--
作者：
Cao, Shan;Li, Shouhai;Huang, Kun
在我们以前的研究中，酚羟基赋予了酚醛聚氨酯热自修复能力。探索不同取代基的多酚制备自修复聚氨酯的可行性。选用漆酚、没食子酸丙酯、邻苯二酚和叔丁基对苯二酚制备了4种酚型聚氨酯，这些多酚在结构上的不同因素共同作用导致了不同的性能和自修复能力。通过DSC测定这四种聚氨酯的峰温度，其顺序为：PTHFTDI-漆酚<PTHFTDI-邻苯二酚<PTHFTDI-没食子酸丙酯<PTHFTDI-叔丁基对苯二酚。变温FT-IR光谱表明，PTHFTDI-没食子酸丙酯具有最低的分解和愈合温度。热重分析结果表明，漆酚的热分解温度越低，其热稳定性越差，其中具有给电子取代基的漆酚具有最好的热稳定性。在相同温度下，三种聚氨酯的愈合能力依次为：PTHFTDI-邻苯二酚<PTHFTDI-漆酚<PTHFTDI-没食子酸丙酯。(c)2018年威利期刊公司J.应用聚合物Sci. 2019，136，47039。
Phenolic hydroxyl gave thermal self-healing ability to phenolic polyurethanes in our previous study. To explore, the feasibility of preparing self-healing polyurethanes through polyphenols with different substituents. Urushiol, propyl gallate, catechol, and tert-butylhydroquinone were chosen for preparation of four phenolic polyurethanes, and the different factors at the structures of these polyphenols worked together led the different properties and self-healing ability. The peak temperatures of these four polyurethanes were determined by DSC in the following order: PTHFTDI-Urushiol < PTHFTDI-Catechol < PTHFTDI-Propyl gallate < PTHFTDI-Tert-butylhydroquinone. Variable-temperature FT-IR spectra displayed that PTHFTDI-Propyl gallate with electron-withdrawing substituent exhibited the lowest decomposition and healing temperatures. Meanwhile, based on TGA analysis, lower decomposition temperature suggested lower thermostability; and PTHFTDI-Urushiol with electron-donating substituent exhibited the best thermostability. At the same temperature, the healing abilities of the three polyurethanes were ranked as follows: PTHFTDI-Catechol < PTHFTDI-Urushiol < PTHFTDI-Propyl gallate. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47039.