A monomer compound comprising: at least one polymerizable functional group per molecule, and at least one bicycloheptenyl-polyether radical per molecule, according to structure (I): €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ -R 13 -R 12 -R 11 €ƒ€ƒ€ƒ€ƒ€ƒ(I) wherein: R 11 is bicyclo [d.e.f] heptenyl, which may optionally be substituted on one or more of its ring carbon atoms by one or two (C 1 -C 6 )alkyl groups per ring carbon atom, d is 2, 3, or 4, e is 1 or 2, f is 0 or 1 , and the sum of d + e + f = 5 R 12 is absent or is a bivalent linking group and R 13 is a bivalent polyether group, useful in making polymers, particularly pH responsive polymers.
