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) 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. Japan, Kyoto,

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

    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. 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. 1044–1050

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. 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. 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,

      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, 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).