Comparison between XPS- and FTIR-analysis of plasma-treated polypropylene film surfaces
Résumé
Plasma treatment is often used to modify the surface properties of polymer films, since it offers numerous advantages over the conventional surface modification techniques. In this paper, a polypropylene (PP) film is plasma-treated using a dielec. barrier discharge (DBD) operating in air at medium pressure (5.0 kPa). The modified polymer films are characterized using contact angle measurements, XPS-anal. and attenuated total reflectance-Fourier transform IR (ATR-FTIR) spectroscopy. Results show that plasma treatment leads to a remarkable decrease in contact angle owing to the implantation of oxygen-contg. functional groups. Using XPS and ATR-FTIR, these oxygen-contg. groups can be identified as C-O, C=O and O-C=O. In this paper, it is also shown that XPS is well-suited to provide quant. chem. anal. of the PP films, while ATR-FTIR can only give qual. information. To perform quant. ATR-FTIR measurements, chem. derivatization will be explored in the near future