Raman Spectroscopy Investigation of Polytetrafluoroethylene in Different Zones of Impact of Continuous CO2 Laser Radiation

The surface of polytetrafluoroethylene (PTFE) irradiated with an IR laser was investigated by Raman spectroscopy. The degree of change in the surface depends on the fluence of the radiation and on the impact zones around the center spot of the laser beam. New absorption bands detected in the spectru...

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Bibliographic Details
Published in:Journal of Russian laser research 2019-11, Vol.40 (6), p.571-580
Main Authors: Allyarov, Sadulla R., Frolov, Ivan A., Tolstopyatov, Evgenii M., Dixon, David A., Vasiliu, Monica, Ivanov, Leonid F., Grakovich, Petr N., Demidov, Sergei V.
Format: Article
Language:English
Subjects:
Absorption spectra
Carbon dioxide
Carbon dioxide lasers
Chains (polymeric)
Density functional theory
Fluence
Infrared spectroscopy
Irradiation
Laser beams
Lasers
Microphotographs
Microwaves
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Polymers
Polytetrafluoroethylene
Raman spectra
Raman spectroscopy
RF and Optical Engineering
Spectrum analysis
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Summary:The surface of polytetrafluoroethylene (PTFE) irradiated with an IR laser was investigated by Raman spectroscopy. The degree of change in the surface depends on the fluence of the radiation and on the impact zones around the center spot of the laser beam. New absorption bands detected in the spectrum of the irradiated polymer indicate the formation of CF 3 groups as a result of the destruction of the polymer chain. Polymer chain carbonization is also observed under laser irradiation. The process of structural changes in laser irradiated PTFE is refined on the basis of obtained microphotographs of the supramolecular structure. Density functional theory calculations are used to help in interpreting the Raman spectra.
ISSN:1071-2836
1573-8760
DOI:10.1007/s10946-019-09839-8