A composition comprising a copolymer having repeating units in any sequence of Formula I wherein R.sub.f is a straight or branched perfluoroalkyl group having from about 1 to about 20 carbon atoms, or a mixture thereof, which is optionally interrupted by at least one oxygen atom, X.sup.3 is oxygen or X.sup.1, each X.sup.1 is independently an organic divalent linking group having from about 1 to about 20 carbon atoms, optionally containing an oxygen, nitrogen, or sulfur, or a combination thereof, G is F or CF.sub.3, A is an amide, j is zero or positive integer, X.sup.2 is an organic linking group, Y is O, N or S, h is zero when Y is N, and h is one when Y is O or S, Z is H, a straight or branched alkyl group having from about 1 to about 4 carbon atoms, or halide, B is H or wherein R.sub.f, X.sup.1, X.sup.3, G, A, and j are as defined above, provided that when B is H, j is a positive integer, m is a positive integer, q is zero or a positive integer when Y is O, and q is a positive integer when Y is N or S, p is zero or a positive integer when Y is O, and p is a positive integer when Y is N or S, each W is independently various copolymer units.