Acrylamide-based copolymers, terpolymers, and use as hydrate inhibitors

A method for inhibiting formation of clathrate hydrates in a fluid capable of forming the clathrate hydrates, the method comprising:

• contacting the fluid with at least one copolymer of General Formula (I) under conditions suitable for forming the clathrate hydrates:
• in which:
• R1, R2, and R3 are each independently chosen from C1 to C30 saturated aliphatic groups,
• R4 is chosen from divalent C4 to C7 linear aliphatic groups and divalent C4 to C7 linear heteroaliphatic groups, optionally substituted with one or more C1-C6 linear aliphatic groups, C1-C6 branched aliphatic groups, or combination thereof, where the divalent C4 to C7 linear heteroaliphatic groups comprise 1 or 2 heteroatoms independently chosen from O, N, and S,
• R5, R6, and R7 are each independently chosen from methyl or hydrogen,
• x is a molar fraction range chosen from 0 to 0.8,
• y is a molar fraction range chosen from 0 to 0.8, where when y is a molar fraction of 0, x is a molar fraction of greater than 0, and where when x is a molar fraction of 0, y is a molar fraction of greater than 0, and
• z is a molar fraction range chosen from 0.1 to 0.9, where the summation of x, y, and z equals 1.