细乳液聚合制备含氟丙烯酸酯三元共聚物及性能表征

本工作以十二烷基硫酸钠（SDS）和脂肪醇聚氧乙烯醚（AEO-9）为乳化剂，采用细乳液聚合的方法，制备了甲基丙烯酸甲酯（MMA）、丙烯酸丁酯（BA）和全氟烷基丙烯酸酯（FA）三元共聚物。采用Fr—IR、^1H—NMR对聚合物的结构进行了表征；采用接触角法研究聚合物乳胶膜的表面性能。系统考察了超声均质强度（超声功率）、超声时间、FA用量、乳化剂用量等因素对细乳液聚合稳定性和乳液粒径及其分布的影响，优化的较佳细乳化工艺为：超声功率300W、超声时间3min、乳化剂用量为2．5％，FA单体质量分数〉4％；所制备的聚合物乳胶膜在低含氟量下即表现出优异的疏水疏油性能。

Synthesis of Fluorinated Acrylate Ternary Copolymer Latex by Miniemulsion Polymerization and Characterization

Using SDS and AEO-9 as the emulsifiers, stable fluoroacrylate ternary copolymer emulsion were made by miniemulsion polymerization with fluoroacrylate （FA）, butyl acrylate （BA）, methyl methacrylate （MMA） as the monomers. The composition of copolymer were demonstrated by FT-IR and 1H NMR. The influences of ultrasonic power, ultrasonic time, FA content and emulsifier dosage on emulsion particle size and its distribution index were investigated and the surface property of films was studied by Wilhelmy method. Ultrasonic power was 300W, ultrasonic time was 3min, emulsifier dosage was 2.5wt% and the fluorine content was more than 4wt% which were the better miniemulsion polymerization process in this work; Some properties of fluoroacrylate copolymer latex of miniemulsion were improved, The prepared polymer emulsion membrane had excellent hydrophobic and oleophobic orooertv with low fluorine content.