Structure, Morphology, and Thermal Properties
of Nanocomposites Based on Polyamido Imide
and Hydrosilicate Nanotubes
G. N. Gubanova
, S. V. Kononova
, M. E. Vylegzhanina
, T. E. Sukhanova
A. I. Grigor’ev
, K. A. Romashkova
, V. M. Svetlichnyi
, E. N. Korytkova
, D. Timpu
, and V. Harabagiu
Institute of Macromolecular Compounds, Russian Academy of Sciences, St. Petersburg, Russia
Institute of Silicate Chemistry, Russian Academy of Sciences, St. Petersburg, Russia
Petru Poni Institute of Macromolecular Chemistry, Romanian Academy, Iasi, Romania
Received March 26, 2010
Abstract—New nanocomposites based on heat-resistant poly[(diphenyl oxide)amido-N-phenylphthalimide]
hydrosilicate nanoparticles of tubular structure were prepared. The structure, morphology,
and thermal properties of the nanocomposites were studied in relation to the content of hydrosilicate nanotubes.
AND POLYMERIC MATERIALS
ISSN 1070-4272, Russian Journal of Applied Chemistry, 2010, Vol. 83, No. 12, pp. 2175–2181. © Pleiades Publishing, Ltd., 2010.
Original Russian Text © G.N. Gubanova, S.V. Kononova, M.E. Vylegzhanina, T.E. Sukhanova, A.I. Grigor’ev, K.A. Romashkova, V.M. Svetlichnyi,
E.N. Korytkova, M. Christi, D. Timpu, V. Harabagiu, 2010, published in Zhurnal Prikladnoi Khimii, 2010, Vol. 83, No. 12, pp. 2048–2055.
Organo-inorganic nanocomposites are novel promis-
ing materials with the properties that cannot be
attained with the components taken separately. It is
known that introduction of small amounts of inorganic
nanofillers of various origins into organic polymers
can lead to essential changes in mechanical, thermal,
dielectric, and transport properties of the materials [1–3].
Much attention is given to the possibility of
polymer modification with nanoparticles to prepare
membrane materials [4–7], in particular, modification
with layered silicates [8–10] and carbon nanotubes
having large specific surface area and high sorption
characteristics [11, 12].
Inorganic nanotubes of oxide and oxyhydroxide
nature are also used as fillers for polymeric nanocom-
posites [13, 14]. Organo-inorganic nanocomposites
with this type of nanotubes of high dispersity de-
monstrated considerable enhancement of the me-
chanical, dielectric, and barrier properties compared to
the base polymer [15, 16].
It is known that composites of at least two types
can be prepared depending on the nature of the
components and on the procedure and conditions of the
synthesis: microcomposites with the filler size
reaching several micrometers and nanocomposites in
which the particle size does not exceed 100 nm and the
particles are surrounded by polymer molecules and
uniformly distributed in the polymer matrix .
Nonuniform distribution of nanoparticles in the poly-
mer matrix (formation of agglomerates) reduces the
practical value of the composites.
At high degree of dispersity of nanoparticles in the
matrix, the barrier properties toward oxygen and
nitrogen increase considerably relative to the unfilled
polymer. The effect becomes still more significant
with an increase in the degree of filling with layered
silicates. A decrease in the permeability to gases was
interpreted from the viewpoint of enhancement of
nanoparticles–polymer interaction and decrease in the
free volume of the material.
In  we prepared for the first time organo-
inorganic composites based on a heat-resistant
polyamido imide and nanotubes of magnesium
of chrysotile structure. A
study of the transport properties of homogeneous
composite films showed that introduction of porous
inorganic tubes (without additional surface treatment)