Waterborne fluorinated polyurethane–acrylate hybrid emulsion modified by long aliphatic chains (WFPUA) is prepared by two steps, which include that the stearyl alcohol (SA)-blocked (end-capped) polyurethanes (SPU) are carried out in the mixtures of vinyl monomers, and then, the WFPUA is prepared via the free radical polymerization after the pre-emulsification of the said system. The characteristic of the reaction is the phase-inversion polymerization. The results show that the emulsifiability of SPU is firstly improved then decreased with the continuous increase in SA content. When the molar ratio of SA to 2-hydroxyethyl methacrylate (HEA) in the SPU is 1:1, the stability, zeta potential, viscosity and particle sizes of the WFPUA emulsion have the best results. The mechanical properties of WFPUA hybrid films deteriorate with the increase in SA content at 20 °C, but the mechanical properties of WFPUA films with more SA content achieve better results at 80 °C. The fluorinated groups migrated to the surfaces more easily with more SA content. In order to form the liquid crystalline-like structure on the WFPUA’s surface, the gradient heating treatment to an elevated temperature (i.e., 120 °C) to properly orient the fluorinated chains is necessary.

中文翻译：

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一种新型长脂肪链改性水性含氟聚氨酯-丙烯酸酯杂化乳液的制备及性能

长脂肪链改性水性氟化聚氨酯-丙烯酸酯杂化乳液 (WFPUA) 由两个步骤制备，其中硬脂醇 (SA) 封端 (封端) 聚氨酯 (SPU) 在乙烯基单体的混合物中进行再将上述体系预乳化后，通过自由基聚合制备WFPUA。该反应的特点是转相聚合。结果表明，随着SA含量的不断增加，SPU的乳化性先提高后降低。当SPU中SA与甲基丙烯酸2-羟乙酯(HEA)的摩尔比为1:1时，WFPUA乳液的稳定性、zeta电位、粘度和粒径效果最好。WFPUA杂化薄膜的力学性能在20℃时随着SA含量的增加而变差，但SA含量较多的WFPUA薄膜在80℃时的力学性能表现更好。含更多 SA 的氟化基团更容易迁移到表面。为了在 WFPUA 的表面形成类似液晶的结构, 需要对高温 (即 120 °C) 进行梯度加热处理, 以正确定向氟化链。