Oxygen Plasma Treatment of Fluorinated Polyimide: An X-Ray Photoelectron Spectroscopy Study
The oxygen plasma induced surface modifications of a fluorinated and conventional polyimide were studied by X-ray Photoelectron Spectroscopy. The interaction between polyimides and oxygen plasma resulted in the formation of carbonyl (>C=O) and carboxylic acid (-COOH) sites in both types of polyimides. In the fluorinated polyimide, -CF3 containing polymeric residues were also detected. The plasma induced residues were loosely bound to the polyimide surface and could be removed by vacuum annealing of the plasma treated surfaces restoring the as-cured polyimide surface chemistry in both types of polyimides. The mechanism of interaction of oxygen plasma with both polyimides leading to the observed surface modifications is discussed.
KeywordsOxygen Plasma Vacuum Annealing Oxygen Plasma Treatment Spectral Subtraction Plasma Treated Surface
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