X-RAY PHOTOELECTRON-SPECTROSCOPY STUDIES OF PLASMA-MODIFIED PET SURFACE AND ALUMINA PET INTERFACE/

X-ray photoelectron spectroscopy was used to study the chemical effect s of a reactive plasma treatment on the PET surface and to investigate the chemical interactions involved at the alumina/PET interface. The treatment of the PET by a carbon dioxide plasma introduces new oxygen reactive species on the polymer surface. Evidence of this chemical mod ification is given by the appearance of additional carbonyl bonds. The interfacial study reveals a reaction of alumina with the oxygen atoms of the carbonyl bonds of PET (plasma-induced carbonyl bonds and carbo nyl bonds of the ester groups). This chemical interaction results in t he formation of Al-O-C interfacial bonds in the early stages of deposi tion.