Melt index and melt viscosity measurements have been made on a series of ethylene-acrylic acid-acrylamide terpolymers. The terpolymers were prepared from a 2000 melt index ethylene-methyl acrylate copolymer and synthesis conditions were adjusted such that the polar groups varied from pure acid to pure amide to pure salt. Results of these measurements indicated the following order of melt viscosities at 190°C: 50% acid-50% amide < 100% amide < 100% acid < 33 1/3% acid amide-salt < 50% salt-50% amide < 50% salt-50% acid ≪ 100% salt. This order apparently arises because of the complex inter- and intramolecular hydrogen bonding and ionic bonding forces that exist in these systems.