1070-4272/05/7801-0144C2005 Pleiades Publishing, Inc.
Russian Journal of Applied Chemistry, Vol. 78, No. 1, 2005, pp. 144!148. Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 1,
2005, pp. 146!150.
Original Russian Text Copyright + 2005 by Ergozhin, Chalov, Kovrigina, Iskakova.
AND POLYMERIC MATERIALS
Ion-Exchange Polymers Based on Dihydroxydiphenylpropane
Diglycidyl Ether, Allyl Halides, and Amines
E. E. Ergozhin, T. K. Chalov, T. V. Kovrigina, and R. A. Iskakova
Bekturov Institute of Chemical Problems, Ministry of Education and Science of Kazakhstan Republic,
Received June 15, 2004
Abstract-Polycondensation of dihydroxydiphenylpropane diglycidyl ether and allyl halides in the presence
of some polyamines was studied. The optimal conditions of formation of ion-exchange polymers with three-
dimensional structure, their composition and structure, and also physicochemical characteristics were
The use of dihydroxydiphenylpropane diglycidyl
ether (ED-20) as initial monomer for synthesis of ion-
exchange resins and membranes provides formation of
ordered structures improving the main physicochemi-
cal, optical, and strength characteristics of the result-
ing polymers [1, 2]. Introduction of allyl compounds
into the reaction mixture improves the performance of
the materials . Therefore, in this work we used allyl
halides [allyl bromide (AB) and allyl chloride (AC)]
as comonomers. The choice of the above compounds
is caused by the fact that these compounds readily
react with homolytic rupture of the C3X bond (where
X is Br, Cl, I, and F) due to conjugation with the C=C
The aim of this work is development of methods
for synthesis and study of characteristics of ion ex-
changers based on industrial epoxy resin, allyl halides
(AHs), and some aromatic and aliphatic polyamines.
Condensation of allyl halides with dihydroxydi-
phenylpropane diglycidyl ether and amines was car-
ried out at 18325oC for 132 h with subsequent curing
of the prepolymer at 803100oC. The gel was milled
and dispersed and the fraction with a grain size of
0.25 mm was selected [5, 6].
Pretreatment and determination of the main physi-
cochemical characteristics were performed by the
procedures described previously .
The IR spectra of the initial, intermediate, and final
products prepared as thin layers and KBr pellets (1 mg
substance + 200 mg KBr) were recorded on a Specord
The potentiometric titration was carried out by the
method of individual weighed portions. A weighed
portion of air-dry anion exchanger (0.2030.25 g) was
brought into contact with various amounts of 0.1 N
nitric acid (from 0.5 to 50 ml). The ionic strength of
the solution (approximately 1 M) was supported by
adding the corresponding amount of potassium nitrate.
After the equilibrium was reached (7310 days), the
pH of the solution was measured on a DL-55 titrator.
With the aim to find the optimum conditions of
synthesis of ion exchangers based on AHs, ED-20,
and amines, we studied how the ratio of the initial
components, the kind of AH, prepolymerization tem-
perature, and curing conditions affect some character-
istics of the anion exchangers (Tables 1 and 2) .
A decrease in the amine concentration results in a
decrease in the static exchange capacity (SEC) from
9.5 to 6.3 in the case of polyethylenimine (PEI) and
from 3.9 to 2.7 mg-equiv g
in the case of poly-2-
methyl-5-vinylpyridine (PMVP). At the same time,
its increase significantly hampers curing of the gel,
which results in deterioration of the mechanical
strength. The kind of allyl compound does not sig-
nificantly affect the SEC. The presence of pyridine
group assists to an increase in the exchange capacity
with respect to highly basic groups.
In condensation of polyfunctional monomers, un-
changed functional groups remain in the resulting
macromolecules, which is caused by their different
reactivity an also by steric and concentration factors.
The presence of double bonds in allyl compounds