ISSN 1070-4272, 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.
MACROMOLECULAR COMPOUNDS
AND POLYMERIC MATERIALS
Copolymerization of Sodium Acrylate with New Acrylamide
Derivatives in the Presence of Water-Soluble Salts
a
b
b
b
M. L. Eritsyan , Zh. B. Barsegyan , Sh. M. Manukyan , and T. D. Karapetyan
a
Abovyan Armenian State Pedagogical University, Yerevan, Armenia
b
Geratsi Yerevan State Medical University, Yerevan, Armenia
Received July 28, 2010
Abstract—Copolymerization of sodium acrylate with new acrylamide derivatives was studied. The copolymerization
constants r and r of the monomers and the molecular weights of the copolymers were determined.
1
2
DOI: 10.1134/S1070427211070226
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 flocculants.
Using the data of Table 1 and the Fineman–Ross
equation [5]
The goals of this study were to investigate the
copolymerization of Na-AA with AA-Der in aqueous
r = K /K , r = K /K ,
1
1,1 1,2
2
2,2 2,1
solutions, to determine the copolymerization constants r1
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]
and r , to elucidate the effect exerted on the comonomer
2
reactivities on comonomers of water-soluble mineral
salts, and to measure the molecular weights of the
copolymers.
pol/[AA-Der] , we determined the copolymerization
pol
constants r and r of the copolymerizing monomers
1
2
AsAA-Der we used CH =CH–CO–NH–CH –SO Na
2
2
3
Na-AA and AA-Der. The values of r and r in relation
1 2
(
Na-MSAA), CH =CH–CO–NH–CH –N(CH CH OH)
2
2
2
2
2
to the structure of the radical in the substituted acrylamide
(MDEAA), and
are given in Table 2, where r = K1,1/K1,2 and r =
1
2
K /K (K1,1 is the constant of the addition of Na-AA
(
)
2,2 2,1
radical to Na-AA monomer, K1,2 is the constant of the
addition of Na-AA radical to the monomer of the corre-
sponding AA-Der, K2,2 is the constant of the addition of
the corresponding AA-Der radical to the own monomer,
and K2,1 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
(
MMAA), synthesized in this study, and as water-soluble
mineral salts, LiCl, CaCl , MgCl , and FeCl .
2
2
3
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.
[Na-AA]/[AA-Der] = 10.0 are given in Table 2.
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).
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-
MSAAmonomer, which is apparently due to electrostatic
1
253