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Non‐Destructive Sub‐Surface Chemical Characterization of Air‐Exposed Plasma Polymers by Energy‐Resolved XPS
Author(s) -
GirardLauriault PierreLuc,
Retzko Iris,
Swaraj Sufal,
Matsubayashi Nobuyuki,
Gross Thomas,
Mix Renate,
Unger Wolfgang E. S.
Publication year - 2010
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.200900130
Subject(s) - x ray photoelectron spectroscopy , trifluoroacetic anhydride , chemistry , allylamine , polymer , acrylic acid , polymer chemistry , organic chemistry , chemical engineering , copolymer , polyelectrolyte , engineering
Plasma polymers containing oxygen‐ and nitrogen‐based surface chemistries were prepared from allyl alcohol, allylamine and acrylic acid. Established selective chemical derivatisation procedures with trifluoroacetic anhydride (TFAA) and 4‐trifluoromethyl benzaldehyde (TFBA) were used to determine alcohols and amines, respectively. Samples were analysed by energy‐resolved XPS (ERXPS), enabling XPS depth resolution. We demonstrated that slightly aged plasma polymers prepared from allyl alcohol and allylamine present a homogeneous sub‐surface chemistry within the range of the XPS information depth (≈10 nm); this was clearly not the case for their acrylic acid counterparts. Furthermore, it is shown that standard derivatisation reactions result in homogeneous changes of the chemistry.