skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Water-soluble copolymers. XLV. Ampholytic terpolymers of acrylamide with sodium 3-acrylamide-3-methylbutanoate and 2-acrylamido-2-methylpropanetrimethylammonium chloride

Abstract

Water-soluble, low charge density polyampholytes have been synthesized by free-radical terpolymerization of acrylamide (AM) with sodium 3-acrylamide-3-methylbutanoate (NaAMB) and 2-acrylamido-2-methylpropanetrimethylammonium chloride (AMPTAC). Terpolymer compositions obtained by [sup 13]C0NMR reflect monomer feed concentrations. Molecular weights and second virial coefficients range from 3.43 to 19.4 [times] 10[sup 6] g/mol and from 1.63 to 3.61 mL mol/g[sup [minus]2], respectively, as determined by low-angle laser light scattering. Ionic associations were explored by investigating the dilute solution properties as a function of terpolymer concentration, terpolymer charge density, and added electrolytes. Terpolymers with 0.5, 2.5, and 5.0 mol% of both of the cationic (AMTAC) and anionic (NaAMB) monomers were soluble in deionized water, whereas those with 10 and 15 mol% of each monomer required electrolyte addition. The higher-density terpolymers undergo a 700% increase in intrinsic viscosity upon changing NaCl concentration from 0.05 to 1M. Polyelectrolyte behavior could be induced by decreasing solution pH below the pK[sub a] of the NaAMB mer. Intermolecular ionic associations resulting in gel networks were studied utilizing dynamic mechanical analysis.

Authors:
;  [1]
  1. Univ. of Southern Mississippi, Hattiesburg (United States)
Publication Date:
OSTI Identifier:
6482709
Resource Type:
Journal Article
Journal Name:
Journal of Applied Polymer Science; (United States)
Additional Journal Information:
Journal Volume: 48:6; Journal ID: ISSN 0021-8995
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; COPOLYMERS; SYNTHESIS; ACRYLAMIDE; CARBON 13; CHEMICAL COMPOSITION; COPOLYMERIZATION; ELECTROLYTES; MOLECULAR WEIGHT; SOLUBILITY; AMIDES; CARBON ISOTOPES; CHEMICAL REACTIONS; EVEN-ODD NUCLEI; ISOTOPES; LIGHT NUCLEI; NUCLEI; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; ORGANIC POLYMERS; POLYMERIZATION; POLYMERS; STABLE ISOTOPES; 400201* - Chemical & Physicochemical Properties

Citation Formats

McCormick, C L, and Salazar, L C. Water-soluble copolymers. XLV. Ampholytic terpolymers of acrylamide with sodium 3-acrylamide-3-methylbutanoate and 2-acrylamido-2-methylpropanetrimethylammonium chloride. United States: N. p., 1993. Web. doi:10.1002/app.1993.070480617.
McCormick, C L, & Salazar, L C. Water-soluble copolymers. XLV. Ampholytic terpolymers of acrylamide with sodium 3-acrylamide-3-methylbutanoate and 2-acrylamido-2-methylpropanetrimethylammonium chloride. United States. doi:10.1002/app.1993.070480617.
McCormick, C L, and Salazar, L C. Mon . "Water-soluble copolymers. XLV. Ampholytic terpolymers of acrylamide with sodium 3-acrylamide-3-methylbutanoate and 2-acrylamido-2-methylpropanetrimethylammonium chloride". United States. doi:10.1002/app.1993.070480617.
@article{osti_6482709,
title = {Water-soluble copolymers. XLV. Ampholytic terpolymers of acrylamide with sodium 3-acrylamide-3-methylbutanoate and 2-acrylamido-2-methylpropanetrimethylammonium chloride},
author = {McCormick, C L and Salazar, L C},
abstractNote = {Water-soluble, low charge density polyampholytes have been synthesized by free-radical terpolymerization of acrylamide (AM) with sodium 3-acrylamide-3-methylbutanoate (NaAMB) and 2-acrylamido-2-methylpropanetrimethylammonium chloride (AMPTAC). Terpolymer compositions obtained by [sup 13]C0NMR reflect monomer feed concentrations. Molecular weights and second virial coefficients range from 3.43 to 19.4 [times] 10[sup 6] g/mol and from 1.63 to 3.61 mL mol/g[sup [minus]2], respectively, as determined by low-angle laser light scattering. Ionic associations were explored by investigating the dilute solution properties as a function of terpolymer concentration, terpolymer charge density, and added electrolytes. Terpolymers with 0.5, 2.5, and 5.0 mol% of both of the cationic (AMTAC) and anionic (NaAMB) monomers were soluble in deionized water, whereas those with 10 and 15 mol% of each monomer required electrolyte addition. The higher-density terpolymers undergo a 700% increase in intrinsic viscosity upon changing NaCl concentration from 0.05 to 1M. Polyelectrolyte behavior could be induced by decreasing solution pH below the pK[sub a] of the NaAMB mer. Intermolecular ionic associations resulting in gel networks were studied utilizing dynamic mechanical analysis.},
doi = {10.1002/app.1993.070480617},
journal = {Journal of Applied Polymer Science; (United States)},
issn = {0021-8995},
number = ,
volume = 48:6,
place = {United States},
year = {1993},
month = {5}
}