Copolymers of Acrylamide and a Novel Sulfobetaine Amphoteric Monomer
Polymers and High Performance Materials
The free radical copolymerization of acrylamide (AM) with 3-(2-acrylamido-2-methylpropyldimethylammonio)-1-propanesulfonate (AMPDAPS) has been studied in the range from 25 to 90% AM in the feed. The value of r1r2 has been determined to be 0.60 for the AM-AMPDAPS pair. The copolymer compositions have been determined from elemental analysis and 13C NMR. Molecular weights were determined using LALLS and were found to vary from 1.7 to 10.2 x 106g/mol. The copolymer microstructures, including run numbers and sequence distributions, were calculated from the reactivity ratios. The solution properties of the AM-AMPDAPS copolymers, as well as the AMPDAPS homopolymer, have been studied as a function of composition, pH, and added electrolytes. The solutions of these polymers show increased intrinsic viscosities in the presence of sodium chloride and/or calcium chloride. The solution behavior of the homopolymer of AMPDAPS is independent of pH. The observed properties are consistent with the charge density of the polymers and the sulfobetaine structure of the AMPDAPS monomer.
ACS Symposium Series
Salazar, L. C.,
McCormick, C. L.
(1991). Copolymers of Acrylamide and a Novel Sulfobetaine Amphoteric Monomer. ACS Symposium Series, 467, 119-129.
Available at: https://aquila.usm.edu/fac_pubs/7064