NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Fluoropolymer Films Deposited by Argon Ion-Beam Sputtering of PolytetrafluoroethyleneThe FT-IR, XPS and UV spectra of fluoropolymer films (SPTFE-I) deposited by argon ion-beam sputtering of polytetrafluoroethylene (PTFE) were obtained and compared with prior corresponding spectra of fluoropolymer films (SPTFE-P) deposited by argon rf plasma sputtering of PTFE. Although the F/C ratios for SPTFE-I and -P (1.63 and 1.51) were similar, their structures were quite different in that there was a much higher concentration of CF2 groups in SPTFE-I than in SPTFE-P, ca. 61 and 33% of the total carbon contents, respectively. The FT-IR spectra reflect that difference, that for SPTFE-I showing a distinct doublet at 1210 and 1150 per centimeter while that for SPTFE-P presents a broad, featureless band at ca. 1250 per centimeter. The absorbance of the 1210-per centimeter band in SPTFE-I was proportional to the thickness of the film, in the range of 50-400 nanometers. The SPTFE-I was more transparent in the UV than SPTFE-P at comparable thickness. The mechanism for SPTFE-I formation likely involves "chopping off" of oligomeric segments of PTFE as an accompaniment to "plasma" polymerization of TFE monomer or other fluorocarbon fragments generated in situ from PTFE on impact with energetic Ar ions. Data are presented for SPTFE-I deposits and the associated Ar(+) bombarded PTFE targets where a fresh target was used for each run or a single target was used for a sequence of runs.
Document ID
20020054220
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Golub, Morton A.
(NASA Ames Research Center Moffett Field, CA United States)
Banks, Bruce A.
(NASA Lewis Research Center Cleveland, OH United States)
Kliss, Mark
Date Acquired
August 20, 2013
Publication Date
January 1, 1998
Subject Category
Nonmetallic Materials
Meeting Information
Meeting: Fluorinated Surfaces, Coatings and Films Symposium
Location: Boston, MA
Country: United States
Start Date: August 23, 1998
End Date: August 28, 1998
Sponsors: American Chemical Society
Funding Number(s)
PROJECT: RTOP 199-04-12-01
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available