中国塑料 ›› 2022, Vol. 36 ›› Issue (5): 47-52.DOI: 10.19491/j.issn.1001-9278.2022.05.009

• 材料与性能 • 上一篇    下一篇

吡啶基聚氨酯的制备及其自修复性能研究

罗军1, 黄宏升2, 叶晓兰1, 任军1, 聂胜强1, 王壹1, 张春梅1, 刘渊1()   

  1. 1.贵阳学院材料磨损与腐蚀防护贵州省教育厅特色重点工程中心,贵阳 550005
    2.贵州理工学院化学与工程学院,贵阳 550003
  • 收稿日期:2022-01-17 出版日期:2022-05-26 发布日期:2022-05-26
  • 通讯作者: 刘渊(1983—),男,教授,从事自修复聚氨酯材料研究,hx0030@gyu.edu.cn
    E-mail:hx0030@gyu.edu.cn
  • 基金资助:
    国家自然科学基金项目(21963006);贵州省教育厅拔尖人才项目(黔教合KY字[2020]036);贵州省高层次创新型人才项目(GYU?2018?LY);贵州省科技计划项目(黔科合基础?ZK[2022]重点002),贵州省普通本科高等学校工程研究中心(黔教合KY字[2012]023号);贵阳学院博士科研启动经费项目(GYU?KY?[2021]),贵州省大学生创新创业项目(202110976012);贵阳学院大学生创新创业项目

Preparation and self⁃healing performance of pyridine⁃containing polyurethane

LUO Jun1, HUANG Hongsheng2, YE Xiaolan1, REN Jun1, NIE Shengqiang1, WANG Yi1, ZHANG Chunmei1, LIU Yuan1()   

  1. 1.Guizhou Provincial College Special Engineering Center for Materials Protection of Wear and Corrosion,Guiyang University,Guiyang 550005,China
    2.School of Chemical Engineering,Guizhou Institute of Technology,Guiyang 550003,China
  • Received:2022-01-17 Online:2022-05-26 Published:2022-05-26
  • Contact: LIU Yuan E-mail:hx0030@gyu.edu.cn

摘要:

为探究氢键对聚氨酯性能的影响,以聚四氢呋喃、异氟尔酮二异氰酸酯、4,4’?二羟基联苯(HBD)和N3,N5?双(4?羟基苯基)吡啶?3,5?二甲酰胺(HPD)制备了2种类型的聚氨酯,并利用红外光谱仪(FTIR)、热重分析仪(TG)、万能力学试验机等对2种聚氨酯的化学结构、热稳定性、力学性能和自修复性能等进行了表征和测试。结果表明,2种聚氨酯均表现出了优异的自修复性能;60 ℃下,两者均30 min即可完成自修复;相较于以HBD为扩链剂制备的聚氨酯,以含有吡啶基团和酰胺基团的扩链剂(HPD)制备的聚氨酯表现出更优异的力学性能(拉伸强度为1.2 MPa)、更优异的热稳定性能(热降解活化能为230.3 kJ/mol)及更高的残炭率(800 ℃残炭率约为5 %)。

关键词: 吡啶, 酰胺, 氢键, 聚氨酯, 自修复

Abstract:

To explore the effect of hydrogen bonds on the properties of polyurethane, two types of polyurethanes were synthesized using polytetrahydrofuran, isophorone diisocyanate, 4,4’?dihydroxybiphenyl, and N3,N5?bis(4?hydroxyphenyl)pyridine?3,5?diformamide as raw materials. Their chemical structure, thermal stability, mechanical properties, and self?healing properties were investigated by Fourier?transform infrared spectroscopy, thermogravimetry analysis, and a universal material testing machine. The results indicated that the two polyurethanes presented excellent self?healing performance, and both of them could completely self?heal the damages after healing at 60 ℃ for 30 min. As a chain extender, the polyurethane synthesized with N3,N5?bis(4?hydroxyphenyl)pyridine?3,5?dicarboxamide exhibited a better mechanical property than that with 4,4’?dihydroxybipheny, exhibiting higher tensile strength of 1.2 MPa, superior thermal stability with thermal degradation activation energy of 230.3 kJ/mol, and a higher carbon residual yield of 5 wt% at 800 oC.

Key words: pyridine, amide, H?bond, polyurethane, self?healing

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