ISSN 1070-4272, Russian Journal of Applied Chemistry, 2016, Vol. 89, No. 9, pp. 1447−1453. © Pleiades Publishing, Ltd., 2016.
Original Russian Text © I.S. Berdyugina, Yu.P. Steksova, A.A. Shibaev, E.A. Maksimovskii, A.G. Bannov,
2016, published in Zhurnal Prikladnoi Khimii, 2016,
Vol. 89, No. 9, pp. 1155−1162.
AND POLYMERIC MATERIALS
Materials based on epoxy resins (ERs) are widely
used today in many branches of industry. Their potential
applications include the use as protective and antielec-
trostatic coatings , as electrects, and as electromag-
netic radiation shields . In addition, epoxy composites
(ECs) are widely used in petrochemical industry, ship
building, and automobile manufacture. One of acute
problems in using ECs is their low thermal stability,
which depends on numerous factors: composite prepa-
ration procedure, properties of the major components of
the composite, and ﬁ ller distribution in the matrix.
The following ﬁ llers were used previously for
inhibiting the thermal degradation of ECs: aluminum
hydroxide, traditional ﬁ re retardants (polybrominated
biphenyls and diphenyl oxides, antimony oxides,
etc.) , and boric acid . Nazarenko et al. used
nanodispersed aluminum powder in an amount of 5 wt
% and highly dispersed boric acid powder (10 wt %) as
ﬁ llers for epoxy composites based on ED-20 resin .
The use of zeolites for enhancing the thermal stability of
epoxy composites was also suggested .
Today it is considered promising to use carbon nano-
tubes for enhancing the resistance of polymer compos-
ites to thermal degradation. For example, Dehghan et
al.  studied the thermal stability of epoxy resin ﬁ lled
with multiwalled carbon nanotubes (MWCNTs). Liu et
al.  suggested using MWCNTs in amounts of 0.25
and 0.75 wt % as ﬁ llers for epoxy composites. Along
with carbon nanotubes, there is a great deal of interest
in thermally expanded graphite (TEG), which can also
be used as ﬁ ller for epoxy composites. However, studies
on thermal degradation of epoxy composites containing
TEG are relatively few.
This study deals with thermal degradation of epoxy
composites ﬁ lled with thermally expanded graphite
and multiwalled carbon nanotubes. We determined the
inﬂ uence exerted by the procedure for preparing the
composites on their thermal degradation.
Thermal Degradation of Epoxy Composites
Based on Thermally Expanded Graphite
and Multiwalled Carbon Nanotubes
I. S. Berdyugina
, Yu. P. Steksova
, A. A. Shibaev
E. A. Maksimovskii
, and A. G. Bannov*
Novosibirsk State Technical University, pr. Karla Marksa 20, Novosibirsk, 630073 Russia
Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences,
ul. Akademika Lavrent’eva 3, Novosibirsk, 630090 Russia
Novosibirsk State University, Novosibirsk, 630090 Russia
* e-mail: firstname.lastname@example.org
Received September 6, 2016
Abstract—Thermal degradation of epoxy composites ﬁ lled with various carbon materials (thermally expanded
graphite, multiwalled carbon nanotubes) was studied. The dynamics of the thermal degradation of epoxy composites
was evaluated by thermogravimetric analysis in the temperature range of 55–700°С (heating rate 10 deg min
in an oxidizing medium. Carbon ﬁ llers were studied by scanning electron microscopy, transmission electron
microscopy, and low-temperature nitrogen adsorption. The inﬂ uence of the composite preparation procedure on
its thermal stability was determined. The type of ﬁ ller signiﬁ cantly inﬂ uences the thermal oxidative degradation
of the composites.