Volume 39, Number 6, September 1997
|Page(s)||617 - 622|
|Section||Condensed matter: structure, thermal and mechanical properties|
|Published online||01 September 2002|
Ordering and viscoelastic relaxation in multiarm star polymer melts
FORTH, Institute of Electronic Structure & Laser,
P.O. Box 1527, 71110 Heraklion, Crete, Greece
2 Max Planck Insitut für Polymerforschung, Postfach 3148, D-55021 Mainz, Germany
3 National Research Council, Ottawa, Ontario K1A 0R6, Canada
Accepted: 30 July 1997
We present small-angle X-ray scattering measurements in model star homopolymer melts with high functionality, revealing liquid-like ordering. Monte Carlo simulations attribute this structure to the nonuniform intramolecular segmental mass distribution, which results in core-shell topology. This ordering is also reflected in their linear viscoelastic response as a new structural mode at low frequencies, due to cooperative rearrangements of the stars.
PACS: 61.25.Hq – Macromolecular and polymer solutions; polymer melts; swelling / 61.41.+e – Polymers, elastomers, and plastics / 61.10.Eq – X-ray scattering (including small-angle scattering)
© EDP Sciences, 1997
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