ISSN 1070-4272, Russian Journal of Applied Chemistry, 2015, Vol. 88, No. 6, pp. 1070−1073. © Pleiades Publishing, Ltd., 2015.
Original Russian Text © D.M. Mognonov, V.N. Kornopol’tsev, O.Zh. Ayurova, M.S. Dashitsyrenova, 2015, published in Zhurnal Prikladnoi Khimii, 2015, Vol. 88,
No. 6, pp. 976−979.
Improving the Wear Resistance
of Polytetraﬂ uoroethylene Friction Surface
D. M. Mognonov, V. N. Kornopol’tsev, O. Zh. Ayurova, and M. S. Dashitsyrenova
Baikal Institute of Nature Management, Siberian Branch, Russian Academy of Sciences,
ul. Sakh’yanovoi 8, Ulan-Ude, 670047 Russia
Received June 18, 2015
esults obtained in a study of doping of the friction surface of polytetraﬂ uoroethylene with polymer-
polymeric mixtures based on aromatic polyheteroarylenes with a structure of a semi-interpenetrating network are
analyzed. It is shown that polymer-polymeric mixtures composed on polybenzimidazoles and poly(amino imide)
resin are structurally active with respect to polytetraﬂ uoroethylene and substantially improve the tribological and
stress-strain properties of composite materials based on this compound.
The reliability of machines and equipment having
units whose details are subject to mechanical wear is
largely determined by the wear resistance of materials
from which they are fabricated. In recent years, the stock
list of articles fabricated from polymeric composite
materials used as wear-resistant construction materials
or wear-resistant coatings has strongly expanded
[1–3]. Development of wear-resistant polymeric
working-contact-zone coatings with improved service
characteristics will make it possible to reduce the wear
and thereby extend the service life of machinery.
Polytetraﬂ uoroethylene (PTFE) is widely used as
a tribotechnical material owing to its high chemical
inertness, small friction coefﬁ cient, and high thermal
stability. However, PTFE has a poor wear resistance,
which can be improved via modiﬁ cation with various
At present, polymeric dispersed and ﬁ brous materials
are widely used to obtain ﬁ lled and reinforced composites
[1–4]. Application of these materials provides certain
advantages over mineral fillers: lower density, high
impact resistance, increased moisture resistance, etc. In
addition, thermal expansion coefﬁ cients of polymeric
ﬁ llers and binders are nearly the same, which gives rise
to the additional effect of strengthening of a ﬁ lled system
because of the reduction of thermal stresses.
In the present study, we obtained and examined new
composite materials based on PTFE and heat-resistant
To create composite materials, we used as a polymeric
matrix PTFE of PN brand [GOST (State Standard)
10007–80], a white loose ﬁ brous powder (manufactured
by Kirovo-Chepetsk chemical combine).
As doping polymeric components served polybenz-
imidazoles (PBIs) (VTU-PBI-IF–76) with various
molecular masses (η
= 0.57, 0.88, 0.94 dL g
poly(amino imide) resin (PAIR) [TU (Technical Speciﬁ ca-
tion) 09-06-173–73], and polymer-polymeric mixtures on
their basis, with a structure of the semi-interpenetrating
network (semi-IPN) and various PBI/PAIR ratios (at
PAIR content of 10 to 50 wt %). The polymer-polymeric
mixture of composition PBI(1,2,3)/PAIR has a semi-IPN
structure obtained as a result of PAIR structuring on the
matrix of a linear PBI [8, 9]. According to the procedure
developed in [8, 9], the polymer-polymeric mixtures of
PBI/PAIR composition were produced by mixing of 2%
solutions of the starting polymers in DMFA, with PAIR
content of 10 to 50 wt %.
Standard samples for physicomechanical and
tribological studies were prepared as follows.