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Fluorination of Polymers by Means of He/CF 4 ‐Fed Atmospheric Pressure Glow Dielectric Barrier Discharges
Author(s) -
Fanelli Fiorenza,
Fracassi Francesco,
d'Agostino Riccardo
Publication year - 2008
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.200800012
Subject(s) - polymer , helium , wetting , analytical chemistry (journal) , dielectric , dielectric barrier discharge , radical , atmospheric pressure , materials science , glow discharge , excitation , chemistry , plasma , composite material , chromatography , organic chemistry , optoelectronics , oceanography , physics , quantum mechanics , engineering , electrical engineering , geology
He/CF 4 ‐fed GDBDs were used to fluorinate PP and PET. The effect of various process parameters on the polymers surface composition and morphology, as well as on their wettability was investigated inside the GDBD existence domain. An extensive surface fluorination of treated polymers due to the grafting of F atoms and CF x radicals was observed. The increase of CF 4 concentration in the feed, of treatment duration, and of excitation frequency resulted in an increase of the fluorination degree corresponding to F/C ratios as high as 1.18 and 1.22 for PP and PET, respectively. The emission spectra of GDBDs fed by helium in mixture with CF 4 , CHF 3 , C 2 F 6 and C 3 F 8 were compared.