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以双键封端水性聚氨酯为反应型高分子,全氟丁基磺酸钾为含氟乳化剂,实现甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)、甲基丙烯酸十二氟庚酯(G04)和聚氨酯的共聚,制备具有核壳结构的含氟丙烯酸酯改性聚氨酯乳液(FPUA)。傅里叶变换红外光谱(FTIR)和透射电子显微镜(TEM)对共聚物组成、乳胶粒的形态进行表征,并通过表面接触角、拉伸实验和热重分析等分别研究了FPUA胶膜的表面能、力学性能和热性能。结果表明,当含氟乳化剂和氟单体用量分别为单体总质量的0.15%和20%时,乳液稳定性好,聚合物胶膜表面能由45.6mN/m下降至22.5 mN/m,表现出良好的疏水疏油性,最大热失重速率温度由348℃提高至398℃。
The double bond terminated waterborne polyurethane is used as the reactive polymer and the potassium perfluorobutane sulfonate is the fluorinated emulsifier to realize the reaction of methyl methacrylate (MMA), butyl acrylate (BA), dodecafluoroheptylmethacrylate (G04) and polyurethane to prepare a fluorine-containing acrylate-modified polyurethane emulsion (FPUA) having a core-shell structure. Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM) were used to characterize the copolymer composition and morphology of the latex particles. The surface of the FPUA film was investigated by surface contact angle, tensile test and thermogravimetric analysis, respectively Can, mechanical and thermal properties. The results show that when the amount of fluorinated emulsifier and fluoromonomer are respectively 0.15% and 20% of the total monomer mass, the emulsion stability is good. The surface energy of the polymer film decreases from 45.6mN / m to 22.5 mN / m, Showed good hydrophobicity and oleophobicity, and the maximum TGD temperature increased from 348 ℃ to 398 ℃.