离子型共聚单体参与下的全氟丙烯酸酯无皂乳液共聚  

Soap-free Emulsion Copolymerization of Perfluoroalkyl Acrylate In the Presence of Ionic Comonomers

作　　者：彭慧[1] 杨婷婷[1] 廖启金[1] 程时远[1] IN Jun Park 

机构地区：[1]湖北大学化学与材料科学学院,武汉430062 [2]韩国化学技术研究所化工系

出　　处：《应用化学》2005年第2期188-194,共7页Chinese Journal of Applied Chemistry

基　　金：中韩政府间合作项目(国科交字[2001]193)

摘　　要：研究了在带磺酸盐离子基团的可共聚单体2- 丙烯酰胺基- 2- 甲基丙磺酸钠(AMPSNa)参与下的全氟 烷基丙烯酸酯/甲基丙烯酸甲酯/丙烯酸丁酯(FA/MMA/n- BA)无皂乳液聚合的共聚动力学及其乳胶粒的成 核机理,聚合反应的表观活化能Ea为84.99kJ/mol。考察了乳胶粒粒径大小及其分布、粒子数密度、乳液的离 心稳定性、耐电解质稳定性、乳胶膜的耐水性及对水的接触角等。结果表明,可共聚单体AMPSNa的加入可获 得平均粒径在130～160nm的乳胶粒,粒径分布较窄,粒子数密度较低,避免了常规乳化剂的影响,提高了乳 胶膜的耐水性和对水的抗浸润力。The soap-free emulsion copolymerization of perfluoroalkyl acrylate(FA), methyl methacrylate(MMA) and n-butyl acrylate(n-BA) was carried out in the presence of sodium 2-acrylamide-2-methyl propanesulfonate(AMPSNa) as an ionic comonomer and potassium persulfate(KPS) as the initiator. The effects of reaction temperature and the concentrations of AMPSNa, KPS and FA on the kinetics of copolymerization, particle size and dispersive index(PDI), particle number per micro liter water(N p) were investigated, the electrolyte stability and centrifugation stability of the emulsions were characterized as well. The aqueous dynamic contact angle and water resistance of FA copolymers were determined. The results show that the diameter of latex particles decreases initially and then increases with increase of AMPSNa and KPS concentrations. The polymerization rate indicates the same trend, while the particle diameter increases gradually with increasing fluorinated monomer amount and temperature. Compared with the copolymers prepared by conventional emulsion polymerization, the aqueous dynamic contact angle as well as water resistance of these copolymers were greatly improved.

关 键 词：全氟烷基丙烯酸酯 无皂乳液 离子型共聚单体 

分 类 号：O631.5[理学—高分子化学]