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Synthesis of Allylamine Plasma Polymer Films: Correlation between Plasma Diagnostic and Film Characteristics
Author(s) -
Denis Laurent,
Cossement Damien,
Godfroid Thomas,
Renaux Fabian,
Bittencourt Carla,
Snyders Rony,
Hecq Michel
Publication year - 2009
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.200800137
Subject(s) - allylamine , plasma polymerization , x ray photoelectron spectroscopy , plasma , analytical chemistry (journal) , polymer , polymerization , fragmentation (computing) , chemistry , amine gas treating , mass spectrometry , plasma parameters , plasma enhanced chemical vapor deposition , degree of polymerization , materials science , ion , polymer chemistry , chemical engineering , organic chemistry , chromatography , chemical vapor deposition , polyelectrolyte , physics , quantum mechanics , computer science , engineering , operating system
Primary amine‐based plasma polymer films (NH 2 ‐PPF) were synthesized using plasma polymerization of allylamine in continuous wave (CW) and pulsed radio‐frequency (RF) modes. Plasma chemistry, studied by residual gas analysis mass spectrometry, revealed that the precursor fragmentation is a function of the equivalent power ( P eq ) dissipated in the discharge, independently of the plasma mode used. X‐ray photoelectron spectroscopy combined with time‐of‐flight secondary ion mass spectrometry suggests as the precursor fragmentation in the plasma increases: (i) a decrease of the primary amine concentration in the NH 2 ‐PPF (% NH 2 ) and (ii) an increase of the cross‐linking degree. For a given P eq , similar to the precursor fragmentation in the plasma, the NH 2 ‐PPF characteristics were found to be independent of the plasma mode used. Therefore, the main advantage of using pulsed RF processes over CW ones is the possibility to work at very low P eq which enables low precursor fragmentation, optimization of % NH 2 , and reduction of the film cross‐linking degree. The chemical composition and the cross‐linking degree of the NH 2 ‐PPF synthesized by allylamine plasma polymerization can thus be tailored by adjusting the equivalent RF power injected in the plasma.