Plasma polymer adhesion promoters for metal-polymer systems - Polyimides and Other High Temperature Polymers - page 365

Figure 4. NEXAFS spectra of a pulsed plasma polystyrene (30 W, 25 Pa, 10 3 Hz, duty cycle 0.1)
and a commercial polystyrene as reference (PEY-Partial Electron Yield mode).

Pulsed plasma polyethylene (PE) shows differences from both the pulsed
plasma polymerised styrene and butadiene as well as from commercial PE. Look-
ing at the valence band spectra, similarities to polypropylene were identified due
to the hyperbranching of this polymer. As described earlier, differences between
the plasma polymers and the reference materials were also obvious in the IR spec-
tra [41, 42]. More than 30% loss in the absorbance of the ν CH 2 and less than 5%

in the aromatic ring vibrations and ν CH arom vibrations of the pulsed plasma PS