Tuning the upper critical solution temperature of acrylamide and acrylonitrile copolymers with ionic monomers.

ABSTRACT: In this research, poly(acrylamide-co-acrylonitrile) (poly(AAm-co-AN)) copolymers were synthesized by free radical polymerization to evaluate the upper critical solution temperature (UCST) of their aqueous solutions. Because of the combined effects of hydrogen bonding and electrostatic interactions, by altering the copolymer composition, pH, and ionic strength of the solution, one may adjust the cloud point. The effect of AN to AAm ratio in the poly(AAm-co-AN) on UCST was investigated, and then the effect of introducing anionic and cationic monomers into the copolymer, as well as the effect of pH on the UCST of aqueous solutions were evaluated. For this purpose, acrylic acid (AA) was added as an anionic monomer and 2-(acryloyloxy)ethyltrimethylammonium chloride as a cationic monomer. Attenu

SUBMITTER: Najafi H 

PROVIDER: S-EPMC12808649 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature