High-resolution X-ray photoelectron spectroscopy of crystalline and amorphous poly(ethylene terephthalate): a study of biaxially oriented film, spin cast film and polymer melt

Autor:	Graham Beamson, D. S-L. Law, Antonino Recca, Valentina Siracusa, D. T. Clark, N. W. Hayes
Rok vydání:	1996
Předmět:	Materials science Ethylene Valence (chemistry) Polymers and Plastics Organic Chemistry X-ray Spectral line Amorphous solid chemistry.chemical_compound Crystallography chemistry X-ray photoelectron spectroscopy Polymer chemistry Thermal Materials Chemistry Electrical conductor
Zdroj:	Polymer. 37:379-385
ISSN:	0032-3861
DOI:	10.1016/0032-3861(96)82906-5
Popis:	High-resolution monochromated X-ray photoelectron spectroscopy (X.p.s.) (core line and valence band) was used to study poly(ethylene terephthalate (PET) as biaxially oriented crystalline film, spin cast amorphous film and amorphous polymer melt. On going from crystalline to amorphous PET the C 1 s glycol component shifts ≈ +0.10 to +0.14eV, relative to the aromatic and carboxyl components. We ascribe this to the change from trans - to gauche -conformation of the glycol segment. Small differences occur in the valence bands of the crystalline and amorphous samples. Time-dependent studies demonstrate that the melt spectra are not significantly affected by thermal degradation. Under the conditions of the X.p.s. analysis molten PET behaves as an electrical conductor.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::74952f60327e0044c62c53f1f591308b https://doi.org/10.1016/0032-3861(96)82906-5 Zobrazit plný text záznamu Full Text from ScienceDirect