Two ion-pair comonomers of 2-methacryloyloxyethyltrimethyl-ammonium 2-methacryloyloxyethanesulfonate (METMAMES) and 3-acrylamido-3-methylbutyltrimethylammonium 2-acrylamido-2-methylpropanesulfonate have been synthesized. The spontaneous and radical homocopolymerizations of these monomer pairs, wherein no nonpolymerizable counterions are present, have also been studied. Moreover, the intrinsic viscosity of the homocopolymer derived from METMA MES was found to increase with increasing KCl concentration in aqueous solutions.