Kinetic features of deposition and chemical composition of coatings, formed from volatile products of laser dispersion of polytetrafluoroethylene

Regularities for the influence of the pulsed laser radiation intensity with $\lambda=1064$ nm on the dispersion parameters of polytetrafluoroethylene (PTFE), the growth rate of polymer coatings, and their chemical composition have been established. Increased intensity of laser radiation increases the rate of the coating deposition without a noticeable effect on the reactivity of volatile dispersion products. The increased intensity of laser exposure leads to an increase in the content of oxygen groups, fluorine-containing graphite-like clusters in the molecular structure of the deposited coating, and the decrease of the contact angle of water wetting. Based on the analysis of changes in the chemical composition of the coatings, a conclusion was made about a two-stage dispersion process: at the initial stage, the composition of volatile products is independent of the laser radiation intensity; at a later stage, it is determined by the degree of defluorination of the target material, which depends on the intensity of radiation.