Three series of methacrylate homopolymers with oligo(hexafluoropropene oxide), (HFPO)(n), side groups and copolymers based on methyl methacrylate were prepared by free radical polymerization. Each series consisted of a polymethacrylate backbone with substituted HFPO side chains of different length ranging from the corresponding tri- and tetramers to a pentamer. In case of the (HFPO)(3)MA copolymers, glass transition temperatures decreased linearly with increasing (HFPO)(3)MA content over the entire composition range. In contrast, two different regimes were distinguished for (HFPO)(5)MA-containing copolymers, and also for the (HFPO)(4)MA homopolymer two T-g＇s were discerned. At low HFPO content the glass transition temperatures decreased with increasing (HFPO)SMA substitution. Above 50 mol % two glass transitions were observed, indicating microphase separation. Copolymers with only 10 mol % of(HFPO)(n)MA exhibited a low surface energy as is typical for highly fluorinated polymers. Dispersion force surface energies were determined by the Good-Girifalco-Fowkes-Young method and resulted in a minimum value of 11 +/- 1 mN/m.