Russian Journal of Applied Chemistry, 2011, Vol. 84, No. 7, pp. 1253−1256.
Pleiades Publishing, Ltd., 2011.
Original Russian Text © M.L. Eritsyan, Zh.B. Barsegyan, Sh.M. Manukyan, T.D. Karapetyan, 2011, published in Zhurnal Prikladnoi Khimii, 2011,
Vol. 84, No. 7, pp. 1183−1186.
AND POLYMERIC MATERIALS
Copolymerization of Sodium Acrylate with New Acrylamide
Derivatives in the Presence of Water-Soluble Salts
M. L. Eritsyan
, Zh. B. Barsegyan
, Sh. M. Manukyan
, and T. D. Karapetyan
Abovyan Armenian State Pedagogical University, Yerevan, Armenia
Geratsi Yerevan State Medical University, Yerevan, Armenia
Received July 28, 2010
Abstract—Copolymerization of sodium acrylate with new acrylamide derivatives was studied. The copolymerization
of the monomers and the molecular weights of the copolymers were determined.
Copolymerization of acrylic acid with acrylamide
derivatives was considered in [1–4]. Copolymers based
on sodium acrylate (Na-AA) and appropriate acrylamide
derivatives (АА-Der) are interesting from the applied
viewpoint as thickeners and ﬂ occulants.
The goals of this study were to investigate the
copolymerization of Na-AA with AA-Der in aqueous
solutions, to determine the copolymerization constants r
, to elucidate the effect exerted on the comonomer
reactivities on comonomers of water-soluble mineral
salts, and to measure the molecular weights of the
As AA-Der we used CH
(MMAA), synthesized in this study, and as water-soluble
mineral salts, LiCl, CaCl
, and FeCl
The conditions of the copolymerization of Na-AA
with AA-Der and the molecular weights and yields of
the copolymers obtained in the absence of mineral salts
are given in Table 1.
The Na-AA concentration in copolymerization with
AA-Der was taken constant in all the experiments
and equal to 0.1 M. The AA-Der concentration in
copolymerization experiments was determined by the
desired [Na-AA]/[AA-Der] ratio (Table 1).
Using the data of Table 1 and the Fineman–Ross
where F is the molar ratio of the comonomers in the
starting mixture, [Na-AA]/[AA-Der], and f is the molar
ratio of the monomeric units in the copolymer, [Na-AA]
, we determined the copolymerization
of the copolymerizing monomers
Na-AA and AA-Der. The values of r
to the structure of the radical in the substituted acrylamide
are given in Table 2, where r
is the constant of the addition of Na-AA
radical to Na-AA monomer, K
is the constant of the
addition of Na-AA radical to the monomer of the corre-
sponding AA-Der, K
is the constant of the addition of
the corresponding AA-Der radical to the own monomer,
is the constant of the addition of the correspond-
ing AA-Der radical to Na-AA monomer). The molecular
weights of the copolymers prepared at the molar ratio
[Na-AA]/[AA-Der] = 10.0 are given in Table 2.
As seen from Table 2, the activity of the addition
of Na-AA radical to MDEAA and MMAA monomers
exceeds the activity of the addition of this radical to Na-
MSAA monomer, which is apparently due to electrostatic