SURFACE-ANALYSIS OF DC OXYGEN PLASMA-TREATED OR CHROMIUM EVAPORATED POLY(ETHYLENE-TEREPHTHALATE) FOILS BY SOFT-X-RAY ABSORPTION-SPECTROSCOPY (NEXAFS)

Citation
I. Koprinarov et al., SURFACE-ANALYSIS OF DC OXYGEN PLASMA-TREATED OR CHROMIUM EVAPORATED POLY(ETHYLENE-TEREPHTHALATE) FOILS BY SOFT-X-RAY ABSORPTION-SPECTROSCOPY (NEXAFS), Polymer, 38(8), 1997, pp. 2005-2010
Citations number
15
Categorie Soggetti
Polymer Sciences
Journal title
ISSN journal
00323861
Volume
38
Issue
8
Year of publication
1997
Pages
2005 - 2010
Database
ISI
SICI code
0032-3861(1997)38:8<2005:SODOPO>2.0.ZU;2-X
Abstract
Surface modified biaxially stretched poly(ethylene terephthalate) (PET ) foils have been analysed by surface sensitive soft X-ray absorption (NEXAFS) spectroscopy. Generally, an orientation of polymer chain segm ents can be detected by a variation of the angle between the linearly polarized synchrotron light beam and the surface normal of the investi gated sample (angle resolved NEXAFS spectroscopy). Biaxially stretched PET foils have been found to be characterized by angle dependent NEXA FS C and O K-edge spectra. This angle dependence was interpreted to be a result of a preferential orientation of the PET chain segments at t he surface wherein the plane defined by the benzene ring is parallel t o the surface plane. In the course of chromium deposition or low press ure O-2 DC plasma treatment that preferential orientation is continuou sly diminished. This is interpreted to be a structural effect of the r espective treatment. (C) 1997 Elsevier Science Ltd.