The effects of ultraviolet-ozone (UVO) oxidation of polyethyleneterephthalate (PET) surfaces have been studied using atomic force microscopy and X-ray photoelectron spectroscopy. Surface oxygen increases from 26 at.% (untreated) to 37 at.% for the most oxidised surfaces produced and an increase in mean surface roughness and grain size is also observed. The larger grains appear to result from the formation of low molecular weight oxidised species by PET chain scission at the ester group and the material formed is therefore COOH/COOR rich. These species are mobile on the polymer surface and coalesce to form 200 nm grains which can be partially removed by water washing. The surface beneath is still rougher and more highly oxidised than untreated PET but the increase in stable oxygen is due to the formation of COH/COR groups.
|Number of pages||5|
|Publication status||Published - 2 Aug 1999|
|Event||Proceedings of the 1998 14th International Vacuum Congress(ICV-14), 10th Conference on Solid Surfaces(ICSS-10), 5th Conference on Nanometre-scale Science and Technology(NANO-5), 10th International Conference on Quantitative Surface Analysis(QSA-10) - Birmingham, UK|
Duration: 31 Aug 1998 → 4 Sep 1998