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Stiff Self-Healing Coating Based on UV-Curable Polyurethane with a “Hard Core, Flexible Arm” Structure
ACS Omega ( IF 3.7 ) Pub Date : 2018-09-14 00:00:00 , DOI: 10.1021/acsomega.8b00925 Jingcheng Liu 1 , Jiancheng Cao 1 , Zhen Zhou 1 , Ren Liu 1 , Yan Yuan 1 , Xiaoya Liu 1
ACS Omega ( IF 3.7 ) Pub Date : 2018-09-14 00:00:00 , DOI: 10.1021/acsomega.8b00925 Jingcheng Liu 1 , Jiancheng Cao 1 , Zhen Zhou 1 , Ren Liu 1 , Yan Yuan 1 , Xiaoya Liu 1
Affiliation
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Two series of ultraviolet (UV)-cured self-healing polyurethane (PU) oligomers were synthesized through a prepolymer process from isophorone diisocyanate (IPDI) or 1,6-hexamethylene diisocyanate (HDI), polycarbonate diol (PCDL) of varying molecular weight (500, 1000, and 2000 Da), and chemically modified cyclotriphosphazene as hard cores were introduced. The synthesized oligomers contained rigid aromatic rings as “hard cores” and long fatty chains as “flexible arms”. Nuclear magnetic resonance spectrometer (H NMR) and Fourier transform infrared spectroscopy were used to characterize the structures of the oligomers. In addition, the UV-cured self-healing PU coatings were prepared by designing some coating formulations with the PU oligomers. The self-healing properties and mechanical properties of the UV-cured coatings were investigated. The results revealed that the coatings had self-healing properties based on hydrogen bonds. As the molecular weight of PCDL decreased, the coatings exhibited increased hardness, tensile strength, and glass transition temperature. Furthermore, the coatings exhibited excellent thermostability. The results proved the application prospects of the self-healing coatings with high repair efficiency and excellent mechanical properties.
中文翻译：
基于紫外线固化聚氨酯的硬质自愈涂层，具有“硬核，柔性臂”结构
通过预聚物工艺由异佛尔酮二异氰酸酯（IPDI）或1,6-六亚甲基二异氰酸酯（HDI），不同分子量的聚碳酸酯二醇（PCDL）合成了两个系列的紫外线（UV）固化的自愈聚氨酯（PU）低聚物。引入500、1000和2000 Da）和化学改性的环三磷腈作为硬核。合成的低聚物包含刚性芳环作为“硬核”和长脂肪链作为“柔性臂”。核磁共振波谱仪（H NMR）和傅里叶变换红外光谱仪用于表征低聚物的结构。另外，通过设计具有PU低聚物的一些涂料配方来制备UV固化的自修复PU涂料。研究了紫外线固化涂料的自修复性能和机械性能。结果表明，该涂料具有基于氢键的自修复性能。随着PCDL分子量的降低，涂层表现出更高的硬度，拉伸强度和玻璃化转变温度。此外，涂层表现出优异的热稳定性。结果证明了修复效率高，机械性能优良的自修复涂料的应用前景。
更新日期：2018-09-14
中文翻译：
基于紫外线固化聚氨酯的硬质自愈涂层，具有“硬核，柔性臂”结构
通过预聚物工艺由异佛尔酮二异氰酸酯（IPDI）或1,6-六亚甲基二异氰酸酯（HDI），不同分子量的聚碳酸酯二醇（PCDL）合成了两个系列的紫外线（UV）固化的自愈聚氨酯（PU）低聚物。引入500、1000和2000 Da）和化学改性的环三磷腈作为硬核。合成的低聚物包含刚性芳环作为“硬核”和长脂肪链作为“柔性臂”。核磁共振波谱仪（H NMR）和傅里叶变换红外光谱仪用于表征低聚物的结构。另外，通过设计具有PU低聚物的一些涂料配方来制备UV固化的自修复PU涂料。研究了紫外线固化涂料的自修复性能和机械性能。结果表明，该涂料具有基于氢键的自修复性能。随着PCDL分子量的降低，涂层表现出更高的硬度，拉伸强度和玻璃化转变温度。此外，涂层表现出优异的热稳定性。结果证明了修复效率高，机械性能优良的自修复涂料的应用前景。
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