Approaches to quantify amine groups in the presence of hydroxyl functional groups in plasma polymerized thin films

Ruiz, J.-C.J.-C.RuizTaheri, S.S.TaheriMichelmore, A.A.MichelmoreRobinson, D.E.D.E.RobinsonShort, R.D.R.D.ShortVasilev, K.K.VasilevFörch, R.R.Förch2022-03-042022-03-042014https://publica.fraunhofer.de/handle/publica/23667910.1002/ppap.201400016The quantification of primary and secondary amines in plasma polymerized allylamine and plasma copolymers of allylamine/octadiene films was carried out using chemical derivatization followed by X-ray photoelectron spectroscopy. Data was analyzed using a combination of the peak-fit-analysis method (PFA) and the quantitative-elemental-analysis method (QEA). The latter method overestimates the secondary amine contribution, since it does not account for the additional reaction of TFAA with OH groups that may be present as a result of surface aging effects. In the current work the PFA method has been extended to enable the separation of -OH groups and secondary amines, thus allowing for a more precise determination of the secondary amine groups even after surface aging.en530Approaches to quantify amine groups in the presence of hydroxyl functional groups in plasma polymerized thin filmsjournal article