The possibility of preparing modification solutions from sodium naphthalenide wastes and their effect on Teflon adhesion were studied.Organometallic complexes of alkali metals (Li, Na, K) and aromatic hydrocarbons (diphenyl, naphthalene, anthracene, etc.) are widely used to enhance adhesion of inert polymers, including Teflon [1,2]. Wastes remaining after modifying the Teflon surface with Na-naphthalene complex comprise more than 70% of the initial active solution. The spent inactive solution containing various toxic compounds after neutralization is discharged into industrial sewage and pollutes the environment.Arene complexes of metals are unstable; they are prepared under the anaerobic conditions [1,3]. Previously [4], we attempted to prepare arene complexes of metals at room temperature in air using ethers [tetrahydrofuran (THF), dimethyl ethylene glycol, dimethyl diethylene glycol, diethyl diethylene glycol] and obtained dark solutions whose color was determined by the kind of metal and aromatic hydrocarbon.In this study we examined by ESR solutions of sodium and naphthalene in THF, prepared at room temperature. We also examined the possibility of reusing the spent inactive solution of sodium naphthalenide to enhance the Teflon adhesion. EXPERIMENTALThe ESR spectra were recorded on a Bruker ESR-300 spectrometer at T = 298 K. The g-factor in the ESR spectra of the solution in question agrees with that of the naphthalene radical anion [5].We attempted to reuse the spent inactive solution.On adding sodium and naphthalene into the spent solution, its color changed from yellowish to dark brown; according to ESR data, this solution is diamagnetic.

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The paper presents the results of tribotechnical tests, thermogravimetric, infrared and x-ray phase analyses of wear products of sheet metalfluoroplastic material with lead (SMFM-Pb) in friction with hardened steel at high slip velocities. Tribotechnical tests show that wear reduction during operation without lubrication in such a regime is provided by the presence of a large volume of the PTFE-composition in the working layer. Moreover, the Charpy rule for friction of SMFM-Pb with the minimum wear rate is completely observed when the component of solid inclusions (in this case of a bronze frame) on the friction surface is one order of magnitude less than the softer and more shear-tolerant PTFE composition surrounding it, the composition being the main donor in the process of the intermediate antifriction layer formation. Based on the infrared and x-ray analyses of wear products of SMFM-Pb, it can be said that the intermediate layer and the layers on the friction surfaces of sheet metalfluoroplastic material with lead and counterbody have an inhomogeneous composition and consist of organofluorine compounds, serving as a lubricant, including a mixture of lead oxyfluorides, fluorides and oxides. Pure PTFE is predominantly transferred to the counterbody that is confirmed by the halo and reflex characteristic of the amorphous and crystalline phases of a polymer. In combination with the PTFE layer transferred to the surface of the counterbody and consisting of highly oriented lamellas with a high bearing capacity and due to the high surface hardness of the counterbody, the resulting third body provides an increase of pV-factor at the maximum allowable temperature of 500-520 K up to 5 MPa × m / c in the new SMFM-Pb.