ISSN 1070-4272, Russian Journal of Applied Chemistry, 2015, Vol. 88, No. 4, pp. 630−632. © Pleiades Publishing, Ltd., 2015.
Original Russian Text © K.S. Margaryan, S.A. Sargisyan, 2015, published in Zhurnal Prikladnoi Khimii, 2015, Vol. 88, No. 4, pp. 598−600.
AND POLYMERIC MATERIALS
Nitrogen-containing heterocyclic vinyl polymers show
promise for the development of materials exhibiting
thromboresistant, antimicrobial, and antiviral properties
[1, 2]. Vinylazoles, in particular, 1-vinyl-1,2,4-triazole
(VTr), and polymers and copolymers based on them
exhibit such valuable properties as biocompatibility and
hydrophilicity [3, 4]. Water-soluble acrylamide (AA)
polymers are also widely used in medicine, as coagulants,
etc. [5, 6].
Copolymerization of VTr with AA allows preparation
of multifunctional copolymers combining the valuable
properties of both monomers. The formation of polymer
ﬁ lms on an electrode surface via electrochemical initiation
is particularly promising.
This study deals with electrochemical radical (co)
polymerization of VTr with AA with the addition of
formaldehyde and without it. The electrochemical
copolymerization was performed on purely iron, copper,
and glassy carbon electrodes in aqueous and aqueous-
ethanol solutions in the presence of p-substituted
phenyldiazonium tetraﬂ uoroborates (PDs) of the general
, where R = H or CH
One-electron electrochemical reduction of the
diazonium cation generates free aryl radicals , which
initiate the polymerization at the electrode surface. The
electrochemical copolymerization was performed in an
unpartitioned glass cell in the galvanostatic mode at a
current density j = 1–20 mA cm
The formation of the polymer ﬁ lm starts virtually
immediately on switching on the current. The weight and
thickness (5–50 μm) of the coatings increase with time,
but at τ
= 4–6 min the gain in the coating weight and
thickness decelerates because of shielding of the metal
with the polymer.
As the current density is increased to 18 mA cm
speciﬁ c weight of the coating increases (Fig. 1). Further
increase in the current density does not lead to noticeable
changes in the coating weight, but the coating quality
becomes appreciably worse. An increase in the cathodic
current density leads to the enhancement of the side
process of hydrogen evolution, deteriorating the quality
of the coatings, as in .
Higher conversion of the monomers under similar
conditions is observed on the copper electrode (Fig. 1,
curve 3), as in .
To modify the polymer obtained, in particular,
to increase the biodegradation time and improve the
physicomechanical properties, we chose formaldehyde
as modifying agent, because it is known [9, 10]
that formaldehyde in the course of electrochemical
of 1-Vinyl-1,2,4-triazole–Acrylamide Copolymers
K. S. Margaryan
and S. A. Sargisyan
Geratsi State Medical University, 2 Koryun Str., Yerevan, 0025 Armenia
National Polytechnic University of Armenia, 105 Teryan Str., Yerevan, 0009 Armenia
Received April 14, 2015
Abstract—Polymer coatings on purely iron, copper, and glassy carbon electrodes were formed by electrochemical
copolymerization of 1-vinyl-1,2,4-triazole with acrylamide. The addition of formaldehyde leads to methylolation
of amide groups of acrylamide and further cross-linking of the polymer chains. The dielectric properties of the
polymer coatings obtained were studied.