Synthesis and characterization of fluorine-containing polyacrylate emulsion with core-shell structure

A fluorine-containing polyacrylate copolymer emulsion with core-shell structure was synthesized by pre-emulsification and semi-continuous polymerization method, in which methyl methacrylate (MMA), butyl acrylate (BA) and hexafluorobutyl methacrylate (HFMA) as the raw material and sodium dodecyl sulfate (SDS) and polyoxyethylene octyl phenyl ether (OP-10) as emulsifier. The effects of core and shell monomer proportion, emulsifier amount, initiator amount, HFMA amount on the emulsion polymerization and properties of the latex film were studied. The chemical components, structure and morphology of copolymer and emulsion were confirmed by IR, laser particle size analyzer and TEM. The surface property, thermal stability and mechanical properties of fluoroacrylate copolymer emulsion films were determined by contact angle, TG and tensile testing machine. The results showed that a clear core-shell structure existed in the fluorine-containing emulsion particles, fluorine is concentrated on the surface of the shell, when m(MMA):m(BA)=1:1, the core/shell ratio is 3:2, emulsifier ratio is 3%, initiator ratio is 0.6%, HFMA ratio is 10%. At the same time, their film showed higher comprehensive performance than that of fluorine-free emulsion.