Issue |
Europhys. Lett.
Volume 58, Number 6, June 2002
|
|
---|---|---|
Page(s) | 844 - 850 | |
Section | Condensed matter: structure, mechanical and thermal properties | |
DOI | https://doi.org/10.1209/epl/i2002-00451-1 | |
Published online | 01 June 2002 |
The role of surface-induced ordering in the crystallisation of PET films
1
Department of Physics and Astronomy,
Cardiff University P.O. Box 913, Cardiff CF2 3YB, UK
2
Cavendish Laboratory, University of Cambridge
Madingley Road, Cambridge CB3 0HE, UK
3
Department of Physics and Astronomy,
University of Sheffield Hounsfield Road,
Sheffield S3 7RH, UK
4
Department of Physics and Astronomy,
University of Leicester Leicester LE1 7RH, UK
5
XMaS beamline, ESRF - BP 220, F-38043
Grenoble Cedex, France
Received:
23
October
2001
Accepted:
29
March
2002
The molecular configuration and long-range order at the surface
of spin-cast poly(ethylene terephthalate) (PET) thin films
spin-cast onto an etched surface during
crystallisation from the amorphous state has been investigated
for a range of annealing temperatures. The structural ordering at
the surface of the film was compared directly with that in the
bulk of the film by employing grazing-incidence X-ray diffraction
with incident angles below, at and above the critical angle for
total reflection. Ordering was observed at the surface at
annealing temperatures of 80–95
, lower than that
in the bulk, involving local parallel alignment of chains in the
plane of the surface with the benzene rings oriented
preferentially with the ring plane parallel to the surface.
Comparison with atomic-force microscopy images enables the fold
configuration at the surface to be deduced.
PACS: 68.47.Mn – Polymer surfaces / 61.10.Kw – X-ray reflectometry (surfaces, interfaces, films) / 61.41.+e – Polymers, elastomers, and plastics
© EDP Sciences, 2002
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