Cationic UV-curable fluorine-containing polyacrylic epoxy prepolymer with good compatibility

UV-curable fluorine-containing polyacrylic epoxy prepolymers were prepared by solution free radical polymerization with n -butyl acrylate (BA), glycidyl methacrylate (GMA) and hexafluorobutyl acrylate (HFBA) as co-monomers．The prepolymers with different molecular weight and fluorine content could be photopolymerized with up to 70% epoxy group conversion after 10   min of UV irradiation. They showed satisfactory compatibility and could form homogeneous cured film with commercial photoinitiator and monomer , evidence with transmittance, mechanic and graphic analysis. Also, they exhibited very good surface tension as low as 24.38   dyn/cm and their glass transition temperature and thermo decomposition temperature raised with the increase of fluoro-content.