Laboratory of Physical Chemistry of Materials,

Institute of Mechanical Engineering Problems,

Russian Academy of Science. 2007- 2011.

 

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;

ao.pozd@mail.ioffe.ru

SHEPELEVSKII Andrej A., PhD of phys.-math. sci., senior sci. researcher;

AnAShepelewsky@yandex.ru

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;

Tadjik State National University, Republic of Tadjikistan, Dushanbe.

 

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 100 C (Fig. 4a).

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. 6. A MODEL OF HEALING OF MICROCRACK IN POLYMER MATRIX FILLED BY FULLERENE MOLECULES. a initial stage; b - formation of covalent bonds between polymer and fullerene; c full pulling-in of fullerene molecule in the microcrack

 

 

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) configuration near a fullerene molecule; (d) PD configuration near a fullerene molecule, located so as to form the 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,

.. 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), 5357.

5. 296. Patent RF 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. Japan, Kyoto,

September 6 11, Japanese Society of Tribologists, Science Council of Japan, G-211,

2009, p. 354.

7. 299. Patent RF 2378297. Antifrictional Composed Material. B.M.Ginzburg, A.P.

Voznyakovskii, S.I. Evlaschenko, D.G.Tochil'nikov

8. 300. B. M. Ginzburg, D. G. Tochilnikov, A. I. Lyashkov, V. L. Lavrientiev,

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, 294300

9. 301. A.P. Voznyakovskii, B.M.Ginzburg, D.Rashidov, D.G.Tochil'nikov, Sh.Tuichiev.

Structure, Mechanical, and Tribological Characteristics of Polyurethane Modified with

Nanodiamonds Polymer Science, Ser. A, 2010, Vol. 52, No. 10, pp. 10441050

10. 304. A.O.Pozdnyakov, B.M.Ginzburg, O.F.Pozdnyakov //Mass Spectra of Molecular

Products Formed during Friction of Polymers. Technical Physics Letters, 2010, Vol. 36,

No. 3, pp. 203206

11. 306. Ginzburg Boris M., Tochilnikov David G., Lyashkov Alexander I., Ugolkov

Valerij L., Lavrentev 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. 279. L.A.Shibaev, E.Yu.Melenevskaya, B.M.Ginzburg, A.V.Yakimanskii,

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. 290. A. O. Pozdnyakov, O. F. Pozdnyakov, L. V. Vinogradova, and B. M. Ginzburg

Thermal Degradation of a Heteroarm Starlike Polymer with Fullerene C60 Core.

Russian J. Appl. Chem., 2009, Vol. 82, No. 4, pp. 650656.

14. 304. A.O.Pozdnyakov, B.M.Ginzburg, O.F.Pozdnyakov. Mass Spectra of Molecular

Products Formed during Friction of Polymers. Tech. Phys. Letters, 2010, Vol. 36, No. 3,

203206.

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. 187190

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, 10071010.

18. 282. Sh.Tuichiev, S.H.Tabarov, B.M.Ginzburg. Effect of C60 Fullerene Additions on the

Mechanical Properties of a PolybutadieneStyrene Raw Rubber. Technical Physics,

2008, Vol. 53, No. 7, pp. 956958

19. 303. B.M.Ginzburg, Sh.Tuichiev, D.Rashidov, S. Kh. Tabarov, and P. I. Ivashchenko

Effect of Multiwalled Carbon Nanotubes on Tensile StressStrain Diagrams of

Amorphous_Crystalline Thermoplastic Polymers. Technical Physics Letters, 2009, 35,

No. 9, 804806.

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. 488501.

 

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. 1. 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. 645650.

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), 491493.

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. 238241

 

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, June 20-24, 2005. P-055.

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, June 20-24, 2005. P-067.

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, May 23-28, 2005.

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).