Detection and Visualization of Minor Irradiation-Induced Changes in Polytetrafluoroethylene (PTFE) by Raman Spectroscopy

Author:

Ryzhkova Galina G.1,Volkov Vladimir T.2,Korepanov Vitaly I.2ORCID

Affiliation:

1. Samara National Research University, Samara, Russia

2. Institute of Microelectronics Technology and High Purity Materials RAS (IMT RAS), Chernogolovka, Russia

Abstract

Exposure of polytetrafluoroethylene (PTFE) to argon plasma results in chemical modification of the polymer near the surface. Interestingly, PTFE modification can be induced by the sub-band gap ultraviolet (UV) irradiation. In the latter case, the changes in the chemical structure are very subtle, and they are practically invisible to conventional experimental techniques. Raman spectra of irradiated and raw samples show practically identical peaks. However, the baseline that is commonly considered as an unwanted spectral component contains an important information that reflects the minor structural changes. With the proper data analysis, this allows us to visualize the effects of the argon plasma and sub-band gap UV irradiation on the polymer.

Publisher

SAGE Publications

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