| Issue |
Europhys. Lett.
Volume 62, Number 5, June 2003
|
|
|---|---|---|
| Page(s) | 746 - 752 | |
| Section | Interdisciplinary physics and related areas of science and technology | |
| DOI | https://doi.org/10.1209/epl/i2003-00436-6 | |
| Published online | 01 May 2003 | |
Heterogeneity of the chain segment dynamics and ordering in lamellar layers of a symmetric triblock copolymer
1
Laboratoire de Physique des Solides (CNRS-UMR 8502), Université Paris-Sud 91405 Orsay, France
2
Institut Curie (CNRS-UMR 168) - rue Pierre et Marie Curie, 75005 Paris, France
3
Institut Charles Sadron (CNRS-UPR 22) - rue Boussingault, 67083 Strasbourg, France
Received:
6
December
2002
Accepted:
31
March
2003
The segmental ordering within the sublayers of a lamellar
polystyrene-poly dimethylsiloxane-polystyrene triblock
(PS-PDMS-PS) is examined by NMR. The carbon and deuterium NMR
line shapes of the PDMS sequence (soft block) reveal clearly a
wide distribution of segmental orientational order S in the
lamellae and thus a distribution of constraints probed by the
chains. It is observed that this distribution is mainly due to
the coexistence of positive and negative S, resulting from a
competitive ordering effect induced by the presence of glassy
interfaces (
in their vicinity) and the chain-end anchoring
junctions (
).
PACS: 82.35.Jk – Copolymers, phase transitions, structure / 68.08.-p – Liquid-solid interfaces / 76.60.-k – Nuclear magnetic resonance and relaxation
© EDP Sciences, 2003
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