A series of polyester-based and polyether-based polyurethane films with fluorinated side chains were synthesized in this study, and the chemical structure of these products was verified using the Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) techniques, nuclear magnetic resonance spectroscopy (NMR) and gel permeation chromatography (GPC). The hydrolysis of fluorinated polyurethane films was explored via immersion in deionized water at different temperatures, and corresponding hydrolysis process was detected by GPC, scanning electron microscopy (SEM), weighting and tensile tests. The results revealed that the incorporation of fluorinated side chains could reduce the surface free energy and enhance the hydrolytic stability of fluorinated polyurethane films; the loss of molecular weight and tensile properties of fluorinated polyurethane films was suppressed during temperature-accelerated hydrolysis due to the hindrance effect of fluorinated side chains and increased van der Waals forces and hydrogen bonding. Compared with fluorinated polyester-based polyurethane films, the fluorinated polyether-based polyurethane films exhibited a better hydrolytic resistance. Fluorinated polyurethanes with enhanced anti-hydrolysis performance can potentially be applied to reduce environmental pollution.

本研究合成了一系列具有氟化侧链的聚酯基和聚醚基聚氨酯薄膜，并利用傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）技术验证了这些产品的化学结构，核磁共振波谱（NMR）和凝胶渗透色谱（GPC）。通过在不同温度下浸泡在去离子水中探索了含氟聚氨酯薄膜的水解过程，并通过GPC、扫描电子显微镜（SEM）、称重和拉伸试验检测了相应的水解过程。结果表明，含氟侧链的加入可以降低表面自由能，提高含氟聚氨酯薄膜的水解稳定性；由于氟化侧链的阻碍作用和增加的范德华力和氢键，在温度加速水解过程中，氟化聚氨酯薄膜的分子量和拉伸性能的损失得到抑制。与氟化聚酯基聚氨酯薄膜相比，氟化聚醚基聚氨酯薄膜表现出更好的耐水解性。具有增强的抗水解性能的氟化聚氨酯可以潜在地用于减少环境污染。氟化聚醚基聚氨酯薄膜表现出更好的耐水解性。具有增强的抗水解性能的氟化聚氨酯可以潜在地用于减少环境污染。氟化聚醚基聚氨酯薄膜表现出更好的耐水解性。具有增强的抗水解性能的氟化聚氨酯可以潜在地用于减少环境污染。