Russian Journal of Applied Chemistry, 2011, Vol. 84, No. 4, pp. 679−684.
Pleiades Publishing, Ltd., 2011.
Original Russian Text © V.F. Kurenkov, A.V. Kurenkov, 2011, published in Zhurnal Prikladnoi Khimii, 2011, Vol. 84, No. 4, pp. 643−648.
AND POLYMERIC MATERIALS
of Sodium 2-Acrylamido-2-methylpropanesulfonate
with Sodium Acrylate in Water–Dimethyl Sulfoxide Solutions
V. F. Kurenkov and A. V. Kurenkov
Kazan State University of Technology, Kazan, Tatarstan, Russia
Received May 6, 2010
Abstract—The solvent effect on the kinetic features of the synthesis and molecular characteristics of the copolymers
in homogeneous radical copolymerization of sodium 2-acrylamido-2-methylpropanesulfonate with sodium acrylate
in water and water–dimethyl sulfoxide mixtures (75 : 25, 50 : 50, 25 : 75) at pH 9 and 60°С in the presence of
potassium persulfate was studied.
Random copolymers of sodium 2-acrylamido-2-
methylpropanesulfonate (Na-AMS) with sodium acrylate
are ﬂ occulants [1, 2] and stabilizers for disperse systems
, thickeners , and antistatic agents , showing
promise for various branches of industry. Along with
practical signiﬁ cance of Na-AMS–Na-AC copolymers,
interest in their synthesis is dictated by unusual features
of radical copolymerization of ionic monomers in vari-
ous media [5−7]. Previously we examined the inﬂ uence
exerted on the copolymerization of Na-AMS with Na-AC
by the solution ionic strength (at varied concentrations of
monomer mixtures  and NaСl added ) and evaluated
the effect of cations (Nа
) on the copolymerization
of Na-AMS with acrylic acid salts in aqueous solutions
In this study we examined previously unknown fea-
tures of homogeneous copolymerization of two ionic
monomers, Na-AMS and Na-AC, in water and water–di-
methyl sulfoxide (DMSO) solutions (75 : 25, 50 : 50, 25 :
75) at pH 9 and 60°С in the presence of potassium per-
sulfate (PP) initiator with the aim to prepare copolymers
with controllable molecular characteristics and properties.
Na-AMS solution was prepared by neutralization of
an aqueous solution of 2-acrylamido-2-methylpropane-
sulfonic acid (Lubrizol, the United Kingdom, mp 185°С)
with an aqueous NaOH solution to pH 9; Na-AC prepared
by the biocatalytic method (Bioamid Public Joint-Stock
Company, Saratov, Russia) was used as 31% solution.
Potassium persulfate was recrystallized two times from
water. The other chemicals were of chemically pure
grade, and helium was of high purity grade. Solutions
were prepared in distilled water.
The copolymerization and experimental procedures
are similar to those described in . Prior to the reaction,
the monomer solutions were deoxygenated by helium
bubbling. The copolymerization kinetics was studied
in glass capillaries with a KM-8 cathetometer. The
initial copolymerization rate v
was determined at low
conversions (<3%). The conversion х (%) was calculated
by the formula
х = —— × 100,