RAFT聚合诱导自组装法合成含氟聚丙烯酸酯无皂乳液

Synthesis of fluorinated polyacrylate surfactant-free emulsion by RAFT polymerization-induced self-assembly method

采用可逆加成-断裂链转移（RAFT）聚合合成的聚丙烯酸（PAA）为大分子RAFT试剂．通过聚合诱导自组装法合成了含氟聚丙烯酸酯无皂乳液。运用傅里叶红外光谱（FT—IR）、核磁共振氢谱（^1H—NMR）、透射电子显微镜（TEM）和动态光散射（DLS）对聚合物结构和乳胶粒进行了表征。结果表明：当NaOH用量为1．2％，PAA嵌段的聚合度为80时，乳液稳定性良好，转化率达95．1％，乳胶粒具有明显的核壳结构，粒径约为155nm。将含氟聚丙烯酸酯无皂乳液用于皮革涂饰后，随着丙烯酸六氟丁酯（HFBA）用量的增加，涂饰后的皮革对水接触角逐渐增加。当HFBA用量为6％时，涂饰后的皮革对水接触角为115．5°。

Polyaerylic acid （PAA） synthesized by reversible addition-fracture chain transfer （RAFT） polymeriza- tion was used as macro-RAFT agent for the preparation of flourinated polyacrylate surfactant-free emulsion via RAFT polymerization-induced self-assembly. The latex particle and the polymer structure were characterized by means of Fourier transform infrared spectroscopy （FT-IR）, ＇ Hydrogen-nuclear magnetic resonance （IH-NMR）, transmission electron microscope （TEM） and dynamic light scattering （DLS） , respectively. The results show that when the dosage of NaOH is 1.2% and the polymerization degree of PAA segment is 80, the latex display excellent stability, the mono- mer conversion can reach 95.1% and the latex particle show an obvious coreshell structure with a diameter of 155nm. Fluorinated polyacrylate surfactant-free latex was applied to finishing leather. The water contact angle of the finished leather increases with the increasing of hexafluorobutyl acrylate （HFBA） dosages. When HFBA amount is 6%, the water contact angle is up to 115.5°.