A.A. Rogachev - Ph.D. (Eng), Senior Research Scientist, Belarusian State University of Transport, Homel A.Р. Luchnikov - Senior Research Scientist, Moscow State Institute of Radio-Engeneering, Electronics and Automation (Technical University) M.A. Yarmolenko - Ph.D. (Eng), Senior Research Scientist, Belarusian State University of Transport, Homel A.V. Rogachev - Dr.Sc. (Chem), BNAS Corresponding Member, Belarusian State University of Transport, Homel

The features of morphology, molecular structure and physic properties of the initial stages of nucleation and growth of polytetrafluoroethylene coatings deposited from active gas phase are examined. It was found that the special features of the initial stages of the deposition process (adsorption of particles from the gas phase nucleation and growth of particles of the polymer phase) largely determine the morphology, molecular structure and physico-mechanical properties of PTFE coating deposited from active gas phase. It is shown that the formation and growth in the initial stages of the coating is to form an adsorbed layer on the surface of low molecular weight fragments, binding of the surface regions with high and preferential interaction potential growth of the particles form a stable base. Preliminary plasma treatment of the substrate surface results in an increase in growth rate and formation of a solid at a lower effective thickness of the PTFE coating with preferably linear macromolecules which have a relatively low molecular weight. Formed in the initial growth stages molecular structure determines the physical and mechanical properties of PTFE coatings into thicker layers.

 

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