Two series of semifluorinated fluorocarbon diblock copolymer P(BMA-b-FAEM) have been synthesized by atom transfer radical polymerization (ATRP)

and the ATRP of fluorinated monomer FAEM initiated by bromine-endcapped PBMA was studied in detail．GPC data showed the block copolymer molecular weight increased linearly with fluorinated monomer conversion．And efficient block copolymer formation had been demonstrated by FTIR and H-NMR

which is indicative of good living character. Combining the GPC and fluorine-element analysis

the molecular weight of fluorinated copolymer was calculated more accurately

the experimental results matched the design very much. Measurements on the thin (perfluoroalkyl) ethyl acrylate-containing acrylic polymer films showing low critical surface tensions and low dispersion force contributions to the surface energy indicated the presence of the fluorinated block at the surface. The results showed that the water and oil repellency increased with the fluorine content in the diblock copolymer. After annealing at different temperatures or different time

the water and oil repellent properties of diblock copolymer were increased to approach maximum values. These phenomena prove the propensity of polymer for fluorine enrichment at air-polymer surface. The sample BMA96 FAEM3.1 (γc=18.7) with incorporation of 10.6wt％ (perluoroalkyl) ethyl acrylate FAEM has obvious water and oil repellent property．Water and paraffin liquid contact angles for the sample BMA96 FAEM3.1 were larger than 100 and 75 degrees respectively

it could be estimated that surface tensions of these polymers were comparable to that of PTFE (γc=18.5). The block copolymer surface showed notable hydrophobic and lipophobic property.