A (per)fluoropolyether polymer [polymer (PFPE A comprising: - at least one (per)fluoropolyoxyalkylene chain [chain (R f )] having two chain ends; - at least one (poly)oxyalkylene chain [chain (R a )] bonded to at least one chain end of said chain (R f ), said chain (R a ) comprising at least one fluorine-free oxyalkylene unit; and - at last one (meth)acrylic monomer recurring unit [unit (MA)] of formula (I): wherein: - R 1 , R 2 and R 3 , equal to or different from each other, are independently selected from a hydrogen atom and a C 1 -C 3 hydrocarbon group; - X is an oxygen atom, a sulphur atom or, a group NR 8 wherein R 8 is selected from a hydrogen atom and a C 1 -C 3 hydrocarbon group; - R 4 is a hydrogen atom or a C 2 -C 20 hydrocarbon chain moiety, wherein said C 2 -C 20 hydrocarbon chain moiety optionally comprises at least one functional group (FG); wherein said at least one unit (MA) is bonded to said at least one chain (R a ) via a linking group (LG) of formula *-(C=O)-R 5 -** wherein R 5 is a C 1 -C 8 alkylene or cycloalkylene group having at least one secondary or tertiary carbon atom, symbol (*) indicates the bond to said chain (R a ), and symbol (**) indicates the bond to said units (MA) through said secondary or tertiary carbon atom. - at least one (per)fluoropolyoxyalkylene chain [chain (R f )] having two chain ends; - at least one (poly)oxyalkylene chain [chain (R a )] bonded to at least one chain end of said chain (R f ), said chain (R a ) comprising at least one fluorine-free oxyalkylene unit; and - at last one (meth)acrylic monomer recurring unit [unit (MA)] of formula (I): wherein: - R 1 , R 2 and R 3 , equal to or different from each other, are independently selected from a hydrogen atom and a C 1 -C 3 hydrocarbon group; - X is an oxygen atom, a sulphur atom or, a group NR 8 wherein R 8 is selected from a hydrogen atom and a C 1 -C 3 hydrocarbon group; - R 4 is a hydrogen atom or a C 2 -C 20 hydrocarbon chain moiety, wherein said C 2 -C 20 hydrocarbon chain moiety optionally comprises at least one functional group (FG); wherein said at least one unit (MA) is bonded to said at least one chain (R a ) via a linking group (LG) of formula *-(C=O)-R 5 -** wherein R 5 is a C 1 -C 8 alkylene or cycloalkylene group having at least one secondary or tertiary carbon atom, symbol (*) indicates the bond to said chain (R a ), and symbol (**) indicates the bond to said units (MA) through said secondary or tertiary carbon atom. - R 1 , R 2 and R 3 , equal to or different from each other, are independently selected from a hydrogen atom and a C 1 -C 3 hydrocarbon group; - X is an oxygen atom, a sulphur atom or, a group NR 8 wherein R 8 is selected from a hydrogen atom and a C 1 -C 3 hydrocarbon group; - R 4 is a hydrogen atom or a C 2 -C 20 hydrocarbon chain moiety, wherein said C 2 -C 20 hydrocarbon chain moiety optionally comprises at least one functional group (FG); wherein said at least one unit (MA) is bonded to said at least one chain (R a ) via a linking group (LG) of formula *-(C=O)-R 5 -** wherein R 5 is a C 1 -C 8 alkylene or cycloalkylene group having at least one secondary or tertiary carbon atom, symbol (*) indicates the bond to said chain (R a ), and symbol (**) indicates the bond to said units (MA) through said secondary or tertiary carbon atom. wherein said at least one unit (MA) is bonded to said at least one chain (R a ) via a linking group (LG) of formula *-(C=O)-R 5 -** wherein R 5 is a C 1 -C 8 alkylene or cycloalkylene group having at least one secondary or tertiary carbon atom, symbol (*) indicates the bond to said chain (R a ), and symbol (**) indicates the bond to said units (MA) through said secondary or tertiary carbon atom. <EOS>