Russian Journal of Applied Chemistry, 2013, Vol. 86, No. 10, pp. 1576−1580.
Pleiades Publishing, Ltd., 2013.
Original Russian Text © N.S. Shaglaeva, V.V. Bayandin, R.G. Sultangareev, T.I. Vakul’skaya, S.S. Khutsishvili, E.A. Orkhokova, G.F. Prozorova, 2013,
published in Zhurnal Prikladnoi Khimii, 2013, Vol. 86, No. 10, pp. 1623−1627.
AND POLYMERIC MATERIALS
Copolymers of Vinyl Chloride Obtained
by Polymer-Analogous Reactions of Polyvinyl Chloride
with Sodium Salts of Heteroaromatic H–N Acids
N. S. Shaglaeva
, V. V. Bayandin
, R. G. Sultangareev
, T. I. Vakul’skaya
S. S. Khutsishvili
, E. A. Orkhokova
, and G. F. Prozorova
Irkutsk State Technical University, Irkutsk, Russia
Favorskii Irkutsk Institute of Chemistry, Siberian Branch of Russian Academy of Sciences, Irkutsk, Russia
Received February 20, 2013
Abstract—By a reaction of PVC with sodium salts of pyrazole and 3,5-dimethylpyrazole we obtained copolymers
possessing paramagnetic properties with a concentration of paramagnetic centers 10
Nowadays research on modification of existing
polymers are especially developed intensively. This
approach allows producing of qualitatively different
materials based on the known industrial polymers with
improved physicochemical and performance properties.
A large-capacity polymer, polyvinyl chloride (PVC), is of
particular interest. PVC is manufactured based on more
than 3000 kinds of polymeric materials. Widespread
use of the polymer has acquired through the ability to
withstand high mechanical loads, easily painted, high
resistance to oxidation, no smell.
Along with the advantages PVC has several drawbacks
, the most significant of which is the lack of
stability at the temperatures required for processing.
Therefore, plasticizers (dialkyl phthalates) and stabilizers
(compounds of lead, cadmium, barium) were introduced
in the course of processing in PVC that led to a reduction
of environmental safety PVC materials and increase their
One way of modifying PVC, which allows changing
the properties and characteristics of the materials
obtained, is copolymerization of vinyl chloride with
vinyl monomers of various nature . Another way
of PVC modiﬁ cation is known, which based on the
chemical reactions of the polymer with low molecular
weight compounds . Previously  it was found
that both insoluble and soluble polymer products are
formed in the reaction of PVC with Na- and K-salts of
the pyrazole (PR), 3,5-dimethylpyrazole (DPR), and
The aim of the study was to examine the reaction
of PVC with Na-salts of PR and DPR, as well as some
properties of the compounds obtained.
In all experiments, PVC emulsion, which is soluble
in dimethylformamide (DMF), cyclohexanone (CH) and,
partly, in dimethyl sulfoxide (DMSO). Molecular weight
of PVC deﬁ ned by viscometric method was 6.3 × 10
Pyrazole and 3,5-dimethylpyrazole were commercial
products, which were treated by sublimation puriﬁ cation
or recrystallization from n-octane.
Nа-Salts of PR, DPR. PR (DPR), 0.1 mol, was dis-
solved in 100 ml of ethanol and into the resulting solution
an aqueous solution containing 0.1 mol of NaOH was
The reaction mixture was heated for 3 hours
at room temperature. After removing the solvents, the
resulting salt was washed with ethanol and dried in a
vacuum dessicator over P
. The purity of the salt was