ISSN 1070-4272. Russian Journal of Applied Chemistry, 2006, Vol. 79, No. 3, pp. 445! 447. + Pleiades Publishing, Inc., 2006.
Original Russian Text + S.V. Ivanov, V.V. Trachevskii, N.V. Stolyarova, L.A. Zozulya, 2006, published in Zhurnal Prikladnoi Khimii, 2006, Vol. 79,
No. 3, pp. 452! 454.
AND POLYMERIC MATERIALS
Plasmochemical Modification of Polymer Surfaces
S. V. Ivanov, V. V. Trachevskii, N. V. Stolyarova, and L. A. Zozulya
National Aircraft University, National Academy of Science of Ukraine, Kiev, Ukraine
Received December 13, 2005
Abstract-Influence of low-temperature plasma on the polymer surface was studied with the aim of preparing
polymers with required surface properties.
The surface properties of most of polymers, even
with a high level of bulk physicomechanical param-
eters, do not meet the industrial, especially aviation,
requirements. Polymer composites based on polyure-
thanes find expanding application. The composites
with required performance can be prepared by varia-
tion of the polyurethane formulation and by introduc-
tion of modifying additives .
Since urethane formation in a multicomponent sys-
tem is a complex process, the performances of poly-
urethanes of different batches, even produced by the
same procedures, can differ essentially. In addition,
for each particular polyurethane, the composition of
the reaction mixture and the type of modifying addi-
tive should be optimized.
A feasible procedure for modifying the structure
and hence for altering the performances of polymer
composites is radiochemical treatment.
Under exposure to ionizing radiation, polymer
composites undergo chemical transformations includ-
ing cross-linking, degradation, and oxidation, which
change their physicomechanical parameters. These
changes can be negative or positive depending on
the radiation dose and the macromolecular structure.
Polymer composites can be modified in a low-tem-
perature plasma .
A gas-discharge low-temperature plasma affects
only the surface layer of a polymer and hence affects
bulk physicomechanical properties of the polymer as
whole to a lesser extent then do other kinds of radia-
tion. However, the surface transformations of the
polymer treated with a low-temperature plasma are
stronger. Therefore, treatment of a polymer composite
with a low-temperature plasma modifies the surface
properties of a composite and has virtually no effect
on its main physicomechanical parameters.
Here we studied the effect of a low-temperature
gas-discharge plasma on the surface properties of
We studied a polyurethane composite containing
saponified vinyl chloride3vinyl acetate copolymer,
urethane prepolymer, and triisocyanate.
The treatment with a low-temperature plasma was
performed on a UVN-2M-1 standard vacuum unit.
A quartz cylinder 60 mm in diameter was used as the
reaction chamber. The reaction chamber was equipped
with side inlets for feeding the reaction gas directly
in the discharge area. To renew the gas phase in the
reactor, its was continuously pumped off through face
A standard generator with a carrier frequency of
40.68 MHz was used as an ac source for the plasma
discharge. The maximal power was obtained by vary-
ing the output resistance.
The structural transformations of the surface of the
polyurethane composites were studied by IR multiple
attenuated total internal reflection spectroscopy (IR
MATIR), electron microscopy, and NMR. The surface
properties of the polyurethane composites were deter-
mined from the changes in their adhesion and triboad-
The MATIR spectra were recorded using a conven-
tional unit containing KRS-5 crystals (14 reflections).
The apparent thickness of the examined layer calcu-
lated by the known equation was 335 mm. The elec-
tron microscopic studies were performed on an elec-