Russian Journal of Applied Chemistry, 2013, Vol. 86, No. 4, pp. 587−590.
Pleiades Publishing, Ltd., 2013.
Original Russian Text © O.A. Cheremisina, M.M. Sychev, N.V. Sirotinkin, T.L. Sviridova, V.V. Popov, 2013, published in Zhurnal Prikladnoi Khimii, 2013,
Vol. 86, No. 4, pp. 630−634.
AND POLYMERIC MATERIALS
Filled Latex Composites with High Dielectric Constant,
Based on Dispersed Ferroelectrics
O. A. Cheremisina
, M. M. Sychev
, N. V. Sirotinkin
T. L. Sviridova
, and V. V. Popov
St. Petersburg State University of Service and Economy, St. Petersburg, Russia
St. Petersburg State Institute of Technology (Technical University), St. Petersburg, Russia
Surel Limited Liability Company, St. Petersburg, Russia
Received August 29, 2012
Abstract—The possibility of controlling the physicochemical properties of suspensions and the electrical proper-
ties of ﬁ lled latex composites containing dispersed ferroelectrics was examined. The use of ferroelectrics as ﬁ llers
allows preparation of polymeric composites with high dielectric constant ε and low dielectric loss, used, e.g., for
the development of dielectric functional layers of electroluminescence light sources.
Polymer electronics undergoes vigorous development
today. The functional materials used in this ﬁ eld are
organic compounds and composites based on them.
This allows preparation of ﬂ exible items, use of cheap
processes for printing active and passive components, and
reduction of the production cost. A topical problem in this
connection is the development of functional composites
based on latexes, aqueous polymer dispersions, with the
aim to abandon the use of expensive and environmentally
harmful solvents. However, despite apparent advantages
of latex technology, its wider use is restricted by problems
with obtaining stable latex–dispersed ﬁ ller suspensions
with the required rheological properties and satisfactory
aggregative and sedimentation stability.
In this study we examined the possibility of controlling
the physicochemical and electrical properties of
filled latex composites (FLCs) containing dispersed
ferroelectrics. The use of ferroelectrics as ﬁ llers allows
preparation of polymeric composite materials with high
dielectric permittivity ε and low dielectric loss. Such
materials are used, in particular, for preparing dielectric
functional layers of electroluminescence light sources
As investigation objects we chose latexes with high
dielectric constant ε: BMNK [ε = 13, TU (Technical
Specification) 38.103670–88] and DMMA [ε = 11,
GOST (State Standard) 13522–78] acrylate latexes and
BN butadiene–nitrile latex (ε = 17, TU 38.103562–84).
As ﬁ llers we used BaTiO
(TU 6-09-3963–75, ε = 1500)
and VS-1 ceramic based on doped barium titanate (GOST
20419–83, ε = 1500). The dispersity of the ﬁ llers was
determined by turbidimetry [2, 3]. Rheological studies
of suspensions were performed with a Rheotest 2 rotary
viscometer. The ﬁ lled latex composites were prepared by
casting of ﬁ lms onto preliminarily degreased aluminum
supports. After drying, the second aluminum electrode
was rubbed in. The dielectric characteristics of the FLCs
were studied in accordance with GOST 6433.4–71 using
an Е 8-4 digital bridge (measurement frequency 1 kHz).
To prevent destabilization and coagulation of latexes,
the dispersed substances prior to introduction into the
latex were converted to a pasty form by dispersing them
in an aqueous solution of a surfactant (OADF-3А, oxy-
ethylidenediphosphonic acid salt, sample from SintezPAV
Research and Production Association) in a ball mill.