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Preparation and hydrophobicity failure behavior of two kinds of fluorine-containing acrylic polyurethane coatings

机译：两种含氟丙烯酸聚氨酯涂料的制备和疏水性损失行为

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摘要

Two kinds of fluorine-containing acrylic copolymers were prepared with an in situ radical polymerization fluorine modification method and a post-polymerization fluorine modification route, respectively. And a kind of common acrylic copolymer as the reference was synthesized. Acrylic polyurethane was prepared using the synthesized acrylic copolymers and a trimer of the hexamethylene diisocyanate curing agent. Different environments including an indoor atmospheric environment, a hygrothermal environment, a different temperature environment, as well as a xenon arc aging environment were employed to investigate the failure behavior of the coatings. Fourier transform infrared spectroscopy (FT-IR) and F-19 NMR were employed to characterize the chemical structure of the copolymers. The glass transition temperature (T-g) of the copolymers was tested using differential scanning calorimetry (DSC). The water contact angles of the coatings were monitored during the failure process. The difference in hydrophobicity of the coatings was examined. The thermostability of the coatings was explored using thermogravimetric analysis (TGA). The elemental composition of the coating surface before and after the failure experiment was analyzed using an X-ray photoelectron spectrometer (XPS). The results showed that the fluorine-containing copolymers and the corresponding hydrophobic coatings were prepared as expected. The Copolymer b coating, from the fluorine-containing acrylic copolymer prepared with the in situ polymerization fluorine modification route, exhibited better hydrophobicity in all of the above environments compared with the hydrocarbon acrylic copolymer coating (Copolymer a). The Copolymer c coating, prepared with the fluorine-containing acrylic copolymer via the post-polymerization fluorine modification method, achieved the best hydrophobicity under moderate conditions and failed quickly in hostile environments. The different fluorine modification methods resulted in different failure behaviors.
机译：用原位自由基聚合氟改性方法和后聚合后氟改性途径制备两种含氟丙烯酸共聚物。合成了一种常见的丙烯酸共聚物作为参考。使用合成的丙烯酸共聚物和六亚甲基二异氰酸酯固化剂的三聚体制备丙烯酸聚氨酯。采用包括室内大气环境，湿热环境，不同的温度环境以及氙弧老化环境的不同环境来研究涂层的失效行为。傅里叶变换红外光谱（FT-IR）和F-19 NMR用于表征共聚物的化学结构。使用差示扫描量热法（DSC）测试共聚物的玻璃化转变温度（T-G）。在破坏过程中监测涂层的水接触角。检查涂层的疏水性差异。使用热重分析（TGA）探索涂层的热稳定性。使用X射线光电子光谱仪（XPS）分析故障实验前后涂层表面的元素组成。结果表明，含氟共聚物和相应的疏水涂层如预期制备。与用原位聚合氟改性途径制备的含氟丙烯酸共聚物的共聚物B涂层在与烃类丙烯酸共聚物涂层（共聚物A）相比，在所有上述环境中表现出更好的疏水性。通过通过后聚合氟改性方法用含氟丙烯酸共聚物制备的共聚物C涂层在中等条件下实现了最佳的疏水性，并且在敌对环境中迅速失效。不同的氟改性方法导致不同的失效行为。

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  • 来源
    《RSC Advances》 |2015年第115期|共10页
  • 作者

    Yang Fei; Zhu Liqun; Han Dongxiao; Li Weiping; Chen Yichi; Wang Xianming; Ning Liang;

  • 作者单位

    Beihang Univ Sch Mat Sci &

    Engn Key Lab Aerosp Adv Mat &

    Performance Minist Educ Beijing 100191 Peoples R China;

    Beihang Univ Sch Mat Sci &

    Engn Key Lab Aerosp Adv Mat &

    Performance Minist Educ Beijing 100191 Peoples R China;

    Beihang Univ Sch Mat Sci &

    Engn Key Lab Aerosp Adv Mat &

    Performance Minist Educ Beijing 100191 Peoples R China;

    Beihang Univ Sch Mat Sci &

    Engn Key Lab Aerosp Adv Mat &

    Performance Minist Educ Beijing 100191 Peoples R China;

    Beihang Univ Key Lab Bioinspired Smart Interfacial Sci &

    Techo Sch Chem &

    Environm Beijing 100191 Peoples R China;

    Marine Chem Res Inst Qingdao 266071 Peoples R China;

    Marine Chem Res Inst Qingdao 266071 Peoples R China;

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  • 正文语种 eng
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