Laboratory of Physical Chemistry of Materials,
Laboratory was
found at 1997.
Head: Dr. Phys.-Math.
Sci., Prof. Boris M. GINZBURG
Tel.: (812)
321-47-83 of.
Fax : (812) 321-47-71
E-mail: bmginzburg@gmail.com
The base staff:
POZDNYAKOV Alexej
O., Assistant Prof., PhD of phys.-math.
sci., senior sci. researcher;
SHEPELEVSKII Andrej A., PhD of phys.-math. sci., senior
sci. researcher;
Tochil'nikov David G., PhD of techn. sci., senior sci. researcher;
THE MAIN DIRECTION
OF SCIENTIFIC ACTIVITY:
1. Tribological
properties of solid polymer systems.
2. Degradation of
solid fullerene-polymer systems.
3. Structure and mechanical
properties of solid polymer systems at different scale levels.
4. Structure and properties
of fullerene and fullerene-polymer solutions.
OBJECTS :
1.Solid polymer
films, fibers and composites, in particular on the base of superplastics,
with fullerene-containing
additives (fullerenes and fullerene soots)
2. Solid polymer films
with covalent and non-covalent bonded fullerenes
3. Fullerene and
fullerene-polymer solutions
4. TECHNIQUES
The measurements of friction coefficient, volume wear
and other tribotechnical parameters are used for study of tribological properties at different pressures
from a few units to hundreds of MPa. For
study of materials' structure are used the methods of others laboratories
in collaboration: SAXS, WAXS, ESCA, TEM, SEM, AFM, different modifications of
mass-spectrometry, DSC, TGA, machines for mechanical tests and relaxation, etc.
MAIN COLLABORATORS
Ioffe Phisico-Technical Institute, RAS;
Institute of Macromolecular Compounds, RAS;
Central Scientific-Research Institute of Synthetic Rubber;
MAIN RESULTS
1. Tribological
properties of fullerene-containing systems.
Different parameters of tribological properties are determined at
variation of type of contact of counterbodies, contact pressures, rate of
sliding, etc. (Fig. 1).
Fig. 1.
Determined tribological parameters. Note: Q is the probability of
transformation of a contact spot into a wear particle by the relative shift of
counterbodies on the diameter of the contact spot; HB is Brinnel's
hardness, Pn is contact pressure; d/g is relation of diameter to
height of wear particle.
Mechanism of action of fullerene-containing additives on antifriction,
antiwear, and antiscoring properties of liquid mineral industrial oil and
greases is investigated. Fullerenes initiates the formation of tribopolymer
film on the friction surfaces at the sliding friction (Fig. 2).
Fig. 2.
FIG. 3.
2. Degradation of
solid fullerene-polymer systems.
It was found a very strong
influence of C60 on the covalently attached to it polymer chains:
for example, the temperature of start or maximum rate of degradation of atactic
polystyrene decreases more than
In the case of mixtures with
polymers fullerene C60 plays a role of a trap of free radicals that
provides an increase of thermal stability from the side of low temperatures as
for atactic poly(methyl methacrylate) (Fig. 4b).
At the thermo-oxidative
degradation of a free-radical poly(methyl methacrylate) a small quantities of C60
in the polymer blend system results in replacement of oxygen by a fullerene and
transfer of degradation, oxidation, and heat generation to higher temperatures.
Fig. 4a.
Fig. 4 b.
3. Structure and mechanical properties of solid polymer systems at
different scale levels.
A new concept was proposed for supermolecular
organization and deformation mechanisms of semicrystalline polymers. This
concept is based on the idea of existence of critical shear angle of
crystallites. From this point of view are interpreted structure changes at all
points of deformation curves. Some new
ideas were developed about the mobility of supermolecular units (such as
fibrils) in oriented semicrystalline polymers. A simple X-ray technique was
proposed for determination of the easiest slip planes in polymer crystallites
(Fig. 5).
Fig . 5.
FIG.
4. Structure
and properties of fullerene and fullerene-polymer solutions
On the base of
SAXS, WAXS, densimetry, and DSC data it was proposed the model of
supermolecular organization of fullerene C60 solutions and their
changes with concentrations in aromatic solvents (Fig. 7).
Fig. 7. The scheme of changes of supermolecular structure of C60 solution (on example of p-xylene), explaining the character of SAXS intensity change. Initial solution (a); a solution at small concentration of C60 (b); a solution at critical concentration Cstr (c); a solution at concentration above critical (d). 1 – non-disturbed solvent; 2, 3 – the greatest and others thermal density fluctuations, respectively; 4 –molecules of C60; 5 – "liophobic" shell around the molecules of C60; 6 – "liophilic" shell and structured solvent with the same elevated density; 7, 8 – suppressed thermal fluctuations with the elevated density. For toluene solutions the single molecules of C60 must be changed on their aggregates.
A model of the supramolecular benzene
structure and its changes induced by the introduction of fullerenes into
benzene is proposed based on the complex consideration of previously calculated
and experimental data (Fig. 8).
Fig. 8. Possible benzene configurations in a block:
(a) PD1 configuration with
displacement toward the same side; (b) PD2 configuration with
periodically alternating displacements toward both sides; (c) Ò configuration
near a fullerene molecule; (d) PD configuration near a fullerene molecule,
located so as to form the Ò configuration with a six-membered fullerene ring; and
(e) PD2 configuration near a fullerene molecule.
5. Main publications,
2007-2011
1. Tribological
properties of solid polymer systems
1. (259). B.M.Ginzburg,
D.G.Tochil'nikov, A.K.
Pugachev, V.M.Oichenko, Sh. Tuichiev,
À.Ì. Leksovskii. Tribological properties of
fluoroplastics modified by additives of
fullerene soot at the sliding friction and
water lubrication. Russian J. Appl. Chem.
2007, 80 (8), 1400-1402.
2. (260). B.M.Ginzburg,
D.G.Tochil'nikov, Sh.
Tuichiev, A.A. Shepelevskii. On the
mechanisms of the increase of wear resistance
of composites on the base of
polytetrafluoroethylene dopped with
fullerene soot. Tech. Phys. Lett. 2007, 33 (10), 893-
895
3. (278). B.M.Ginzburg, A.O.Pozdnyakov , D.G.Tochil'nikov, Sh.Tuichiev, A.A.Shepelevskii.
Tribological
Characteristics of Composites based on Poly(tetrafluoroethylene) and
Fullerene Soot. Polymer Sci. A.
2008,
50 (8), 1483-1492.
4. 286. B.M.Ginzburg, A.I.Lyashkov, A.V.Savitskii, N.Z.Sobolev, D.G.Tochil'nikov.
Comparison
of Tribological Properties of Various Carbon Plastics under Water-
Lubricated
Sliding Friction. J. Friction
and Wear, 2009, 30 (1), 53–57.
5. 296. Patent RF ¹ 237 6327.
Antifrictional Composed Material.
B.M.Ginzburg,
A.I. Lyashkov, B.I.Michailov,
V.M.Prokof'ev, D.G.Tochil'nikov,
N.Z.Sobolev,
Yu.V.Olenin, A.V.Savitskii.
6. 298. Pozdnyakov
A., Ginzburg B. Molecular mechanisms of polymer composites wear as
revealed by mass-spectrometry. Proc.
4rd World Tribology Congress.
September 6 – 11,
Japanese Society of Tribologists, Science Council of
2009, p. 354.
7. 299. Patent RF ¹2378297. Antifrictional
Composed Material. B.M.Ginzburg, A.P.
Voznyakovskii, S.I. Evlaschenko,
D.G.Tochil'nikov
8. 300. B.
M. Ginzburg, D. G. Tochil’nikov, A. I. Lyashkov, V. L. Lavrient’iev,
A.M. Leksovskii, A. O. Pozdnyakov, O. F.
Pozdnyakov, T. E. Sukhanova, and A. A.
Shepelevskii. Poly-p-Phenyl Sulfide as the Material for
Water-Lubricated Sliding
Bearings. J.
Friction and Wear, 2010, 31, No. 4, 294–300
9.
Structure, Mechanical, and
Tribological Characteristics of Polyurethane Modified with
Nanodiamonds Polymer
Science, Ser. A, 2010, Vol. 52, No. 10, pp. 1044–1050
10.
Products Formed during
Friction of Polymers. Technical
Physics Letters, 2010, Vol. 36,
No. 3, pp. 203–206
11. 306. Ginzburg
Boris M., Tochil’nikov David G., Lyashkov Alexander I., Ugolkov
Valerij L., Lavrent’ev Victor K., Shijan
Pavel A., Ponimatkin Vladimir P. //
Tribological Properties of
Poly(para-Phenylene Sulfide) and Its Carbon Fiber
Composites with Water Lubrication // J.
Macromolecular Sci. B, Physics. 2011. V. 50
(6).
P. 1047 - 1061
2. Degradation of
solid fullerene-polymer systems.
12.
O.V.Ratnikova, A.V.Gribanov. Thermal and Tribological Properties of Fullerene-
Containing Composite Systems. Part 3.
Features of the Mechanism of Thermal
Degradation of Poly-(N-Vinyl-Pyrrolidone)
and Its Compositions with Fullerene C60.
J. Macromol. Sci., B, Physics, 2008, V. 47.N2. 276-287.
13.
Thermal Degradation of a Heteroarm
Starlike Polymer with Fullerene C60 Core.
Russian J. Appl. Chem., 2009, Vol. 82, No.
4, pp. 650−656.
14.
Products Formed during
Friction of Polymers. Tech. Phys. Letters, 2010, Vol. 36, No. 3,
203–206.
15. 316. B.M.Ginzburg, Influence of Sublimation of Degradattion Products on the Profile of
DSC Curves for Polymer Materials. Polymer
Sci., ser A, Accepted for Publication.
3. Structure and
mechanical properties of solid polymer systems at different scale levels.
16. 254. B. M. Ginzburg, Sh. Tuichiev, S. Kh. Tabarov,
and A. A. Shepelevskii
Small-Angle X-ray Scattering
Study of the Structure of Powder Fullerene C60 and
Fullerene Soot. Crystallography
Reports, 2007, Vol. 52, No. 2, pp. 187–190
17. 261. B. M. Ginzburg*, S. Kh. Tabarov, Sh. Tuichiev,
and A. A. Shepelevskii.
Effect of C60 Fullerene
Additives on the Structure and Mechanical Properties
of Thin Organic Glass Films.
Technical Physics Letters, 2007, 33,
No. 12, 1007–1010.
18. 282.
Sh.Tuichiev, S.H.Tabarov,
B.M.Ginzburg. Effect of C60 Fullerene
Additions on the
Mechanical Properties of a
Polybutadiene–Styrene Raw Rubber. Technical Physics,
2008, Vol. 53, No. 7, pp.
956–958
19. 303. B.M.Ginzburg, Sh.Tuichiev, D.Rashidov, S. Kh. Tabarov, and P. I. Ivashchenko
Effect of Multiwalled Carbon Nanotubes on
Tensile Stress–Strain Diagrams of
Amorphous_Crystalline
Thermoplastic Polymers. Technical Physics Letters, 2009, 35,
No. 9, 804–806.
20. 312. B.M.Ginzburg , Sh. Tuichiev, D. Rashidov, S. Kh. Tabarov, T.E.
Sukhanova,
M. E. Vylegzhanina, A. A.
Kutin, and V. L. Ugolkov. Effect of Fullerene C60 on the
Structure and Mechanical Characteristics
of Polyethylene: Technological Aspect.
Polymer Science, Ser. A,
2011, Vol. 53, No. 6, pp. 488–501.
4. Structure and
properties of fullerene and fullerene-polymer solutions.
21. 253. B.M.Ginzburg, Sh.Tuichiev. Structure changes
of aromatic solvents under the
action of microadditives of C60
fullerene solvated in them. Kristallographija
(=Crystallography Reports). 2007. V.52.
¹1. 109-112
22. 258.
B.M.Ginzburg, Sh.Tuichiev. Density changes of C60 solutions in some aromatic
solvents in dependence of fullerene
concentrations. Technical Physics Letters, 2007, 33
(8), 639-640.
23. 280.
B.M.Ginzburg, Sh.Tuichiev. Structuring
of Aromatic Solvents in the Presence
of Small Amounts of
Fullerene C60. Russian Journal of Applied Chemistry, 2008, Vol.
81, No. 4, pp. 618-
622
24. 281. B.M.Ginzburg
and Sh.Tuichiev. Variations in the
Structure of Aromatic Solvents
under the Influence of
Dissolved Fullerene C70. Crystallography
Reports, 2008, Vol. 53,
No. 4, pp. 645–650.
25. 289.
B.M.Ginzburg, Sh.Tuichiev, and
S.Shuchiev. Permittivity of
Low_Concentration
C60 Fullerene Solutions in p-Xylene.
Technical Physics Letters, 2009, 35
(6), 491–493.
26. 305. B. M.
Ginzburg, Sh. Tuichiev, and A. V. Yakimanskii. Supramolecular Benzene.
Structure and Its Changes under the
Action of Dissolved Fullerenes. Crystallography
Reports, 2011, Vol. 56, No. 2, pp. 238–241
6. PROPOSALS FOR
COLLABORATION
Laboratory can
propose the studies the objects by different techniques, the development
of studies in
different directions of common interest, common projects, the change by
specialists and information (lectures, reports, reprints, etc.)
7. International collaboration
The researchers of
the lab. took part in different International conferences and seminars:
1. B.M. Ginzburg, Sh. Tuichiev, S.H. Tabarov, E.Yu. Melenevskaja, D.
Salomov, L.A.Shibaev. On the Supermolecular Structure of Fullerene C60
Solutions in Aromatic Solvents. 5-th International Symposium. Molecular
Mobility and Order in Polymer Systems. St.-Petersburg,
2. L.A.Shibaev, E.Yu.
Melenevskaja, L.V.Vinogradova, I.V.Berlinskii, B.M. Ginzburg.
The Mechanism of Thermal Degradation of Poly-(N-Vinylpyrrolidone) and
its Composites with Fullerene C60. 5-th International Symposium. Molecular Mobility and Order in Polymer
Systems. St.-Petersburg,
3. A.M.Stalevich,
B.M.Ginzburg. Micro-mechanism of non-linear viscoelasticity of oriented
polymers. Fiber-like materials of XXI century. Intern. conf. and exhibition. St.-Petersburg,
Laboratory has the
common Russian-Ukrainian and Russian-Belorussian Grants in the frames of RSSI
(2009-2011).
On the base of the results of lab. some lectures were delivered
at the scientific Institutes of Germany (Universities
of Berlin, Hamburg, Duisburg, Freiburg, Ulm, Regensburg, Max Plank Institute in
Mainz, Institute of Fraunhoffer Society in Teltow); Institute of Polymers of
Polish Academy of Sci, Warsaw; Institute of Macromolecular Chemistry of Czech
Acad. Sci., Prague; Institute of Polymers of Slovakian Acad. Sci., Bratislava;
University of Athens).