Vacuum UV photo-oxidation of polystyrene

2016 ◽  
Vol 30 (20) ◽  
pp. 2212-2223 ◽  
Author(s):  
Xinyun Li ◽  
Marc Toro ◽  
Fei Lu ◽  
Jung On ◽  
Alla Bailey ◽  
...  
Keyword(s):  
Photo Oxidation ◽  
Vacuum Uv

Vacuum UV photo-oxidation of poly(ethylene terephthalate)

2017 ◽  
Vol 31 (23) ◽  
pp. 2542-2554 ◽  
Author(s):  
Andrew Morgan ◽  
Matthew Cocca ◽  
Katerine Vega ◽  
Andrew Fleischer ◽  
Surendra K. Gupta ◽  
...  
Keyword(s):  
Ethylene Terephthalate ◽  
Photo Oxidation ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Vacuum Uv

Photo-oxidation of Multiwalled Carbon Nanotubes

2005 ◽  
Vol 887 ◽  
Author(s):  
B. Parekh ◽  
Thomas Debies ◽  
Pam Knight ◽  
K. S. V. Santhanam ◽  
Gerald A. Takacs
Keyword(s):  
Oxygen Concentration ◽  
Photoelectron Spectroscopy ◽  
Functional Group ◽  
Uv Treatment ◽  
Microwave Plasmas ◽  
Multiwalled Carbon ◽  
X Ray ◽  
Photo Oxidation ◽  
Vacuum Uv ◽  
Surface Curve

ABSTRACTMWNTs were photo-oxidized in quartz boats using low-pressure Hg lamps and emission downstream from Ar microwave plasmas which are primarily atomic line sources of 253.7 and 184.9 nm UV, and 106.7 and 104.8 nm vacuum UV (VUV) radiation, respectively. X-ray photoelectron spectroscopy (XPS) showed rapid oxidation during the first hour of UV treatment and then an increase that was directly proportional to the time of treatment up to 4 h where the oxygen concentration was 7.5 at%. VUV photo-oxidation resulted in an oxygen concentration up to 9.5 at% with exposure time for the initial 2 h of treatment. Beyond 2 h, the oxygen concentration decreased with VUV exposure due to a larger rate of de-oxidation than oxidation at the surface. Curve fitting of the XPS C1s spectra revealed mainly the C-O-C functional group with the presence of C=O, O-C=O and O=C-O-C=O moieties. SEM micrographs showed no apparent effect on the structure or appearance of the MWNTs as expected for surface modification.

Adhesion of Copper to Teflon ® poly(tetrafluoroethylene-co-perfluoropropyl vinyl ether) (PFA) Surfaces Modified by Vacuum UV Photo-oxidation Downstream from Argon Microwave Plasma

2004 ◽  
Vol 851 ◽  
Author(s):  
W. Dasilva ◽  
A. Entenberg ◽  
B. Kahn ◽  
T. Debies ◽  
G. A. Takacs
Keyword(s):  
Vinyl Ether ◽  
Microwave Plasma ◽  
Chain Scission ◽  
Cohesive Failure ◽  
Short Treatment ◽  
Water Contact ◽  
Photo Oxidation ◽  
Sputter Deposited ◽  
Plasma Factors ◽  
Vacuum Uv

ABSTRACTGood practical adhesion of sputter-deposited Cu is achieved to poly(tetrafluoroethylene-co-perfluoropropyl vinyl ether) (PFA) surfaces at short treatment times of vacuum UV (VUV) photo-oxidation downstream from Ar microwave (MW) plasma. Factors contributing to the adhesion include: (1) an improvement in wettability as observed by water contact angle measurements; (2) surface roughening; (3) defluorination of the surface; (4) cross-linking at the surface and (5) incorporation of oxygen as CF-O-CF2, CF2-O-CF2 and CF-O-CnF2n+1 moieties. With long treatment times, a cohesive failure occurred within the modified PFA and not at the Cu-PFA interface due to extensive chain scission weakening its mechanical properties.

Surface modification of Teflon® PFA with vacuum UV photo-oxidation

2006 ◽  
Vol 20 (5) ◽  
pp. 437-455 ◽  
Author(s):  
W. Dasilva ◽  
A. Entenberg ◽  
B. Kahn ◽  
T. Debies ◽  
G. A. Takacs
Keyword(s):  
Surface Modification ◽  
Photo Oxidation ◽  
Vacuum Uv

Vacuum UV actinometry. Ion current measurements with enclosed light sources

1976 ◽  
Vol 73 ◽  
pp. 436-440 ◽  
Author(s):  
Jan A. Herman ◽  
Janusz Gawlowski
Keyword(s):  
Ion Current ◽  
Light Sources ◽  
Vacuum Uv
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