Premium
Effect of ionic strength on the reactivity ratios of acrylamide/acrylic acid (sodium acrylate) copolymerization
Author(s) -
Riahinezhad Marzieh,
Kazemi Niousha,
McManus Neil,
Penlidis Alexander
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.40949
Subject(s) - copolymer , reactivity (psychology) , polyelectrolyte , acrylic acid , polymer chemistry , ionic strength , acrylate , monomer , acrylamide , chemistry , sodium , ionic bonding , kinetics , materials science , chemical engineering , polymer , organic chemistry , aqueous solution , ion , medicine , physics , alternative medicine , pathology , quantum mechanics , engineering
The ionic strength (IS) of polyelectrolyte solutions plays an important role in influencing reaction kinetics. The largely unstudied effect of IS on monomer reactivity ratios and copolymerization rates of acrylamide (AAm) and acrylic acid (AAc), in the form of sodium acrylate (NaAc), is investigated. Salt addition affects the nature of overall charges of the polyelectrolyte solution and diminishes the electrostatic repulsions between reacting chains. Therefore, changing the IS of the solution by incorporating salts affect not only the point estimates of the monomer reactivity ratios but also the overall behavior of the copolymerization (with a transition to azeotropic behavior). Experimental results on copolymerization rates confirm the observed trends in reactivity ratio behavior. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40949.