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首页> 外文期刊>Polymers for advanced technologies >Synthesis and characterization of fluorine-containing polyacrylate latex with core-shell structure by UV-initiated seeded emulsion polymerization
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Synthesis and characterization of fluorine-containing polyacrylate latex with core-shell structure by UV-initiated seeded emulsion polymerization

机译：UV引发的种子乳液聚合合成核壳结构含氟聚丙烯酸酯胶乳及其表征

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摘要

A core-shell fluorine-containing polyacrylate emulsion was successfully prepared by UV-initiated seeded emulsion polymerization in two stages in the presence of two photoinitiators. The water-soluble photoinitiator for the core polymerization and the oil-soluble photoinitiator was used for the shell polymerization. Both of the two stage polymerizations could be completed within 15 min and displayed a conversion above 94%. The emulsion and the films were characterized by Fourier transformed infrared spectrometry, transmission electron microscopy, dynamic light scattering, X-ray photoelectron spectroscopy (XPS), contact angle (CA), and thermogravimetry analysis, respectively. The analysis results indicated that the fluorine-containing latex particles had very small particle size (40 nm) with a core-shell structure and a narrow particle size distribution. XPS analysis revealed that a gradient concentration of fluorine excited in fluorine-containing emulsion film from the film-air interface to the film-glass interface. In addition, the film formed from the fluorine-containing emulsion exhibited not only higher thermal stability but also better hydrophobicity than that of the fluorine-free emulsion.
机译：在两种光引发剂的存在下，通过紫外线引发的种子乳液聚合，分两个阶段成功地制备了核-壳型含氟聚丙烯酸酯乳液。用于核聚合的水溶性光引发剂和用于壳聚合的油溶性光引发剂。两阶段聚合反应均可以在15分钟内完成，并显示出94％以上的转化率。分别通过傅立叶变换红外光谱，透射电子显微镜，动态光散射，X射线光电子能谱（XPS），接触角（CA）和热重分析来表征乳液和薄膜。分析结果表明，含氟胶乳颗粒具有非常小的粒径（40nm），具有核-壳结构和窄的粒径分布。 XPS分析表明，从膜-空气界面到膜-玻璃界面，在含氟乳胶膜中激发的氟的梯度浓度。另外，与无氟乳液相比，由含氟乳液形成的膜不仅显示出更高的热稳定性，而且还具有更好的疏水性。

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