A method of preparing a fluorine-containing polymer surfactant

A method for preparing a fluorine-containing polymer surfactant, the initiator, methacrylic acid -N, N- dimethylaminoethyl methacrylate, and chain transfer agent, 1,4-dioxane, under argon protection, the reaction at 60-90 ℃ 2-8h, polymethacrylic acid to obtain -N, N- dimethylaminoethyl acrylate; an initiator is then added, butyl acrylate and hexafluoroisopropyl 1,4-dioxane, under argon protection , the reaction at 65-95 ℃ 2-8h, and precipitated in n-hexane, and drying to obtain a fluorine-containing polymer surfactant, RAFT polymerization technique using the present invention, the fluorinated polymeric surfactant prepared contains fluorine-containing fluorine-containing monomer unit similar structure, having a narrow molecular weight distribution, adjustable structure, low critical micelle concentration, good emulsifying, foaming and poor characteristics, have broad application prospects in emulsion polymerization.