| Issue |
Europhys. Lett.
Volume 35, Number 6, August III 1996
|
|
|---|---|---|
| Page(s) | 419 - 424 | |
| Section | Atomic, molecular and optical physics | |
| DOI | https://doi.org/10.1209/epl/i1996-00130-3 | |
| Published online | 01 September 2002 | |
Influence of chain length on the interface width of an incompatible polymer blend
Max-Planck-Institut für Polymerforschung - Postfach 3148, 55021
Mainz, Germany
Received:
15
November
1995
Accepted:
26
June
1996
The interface width between polystyrene and poly-(methyl methacrylate) has been
determined by neutron reflectometry as a function of molecular weight. It changes with
molecular weight between 
and 
in the investigated range.
The molecular-weight dependence is consistent with a mean-field theoretical description
of the interface width of incompatible polymer blends. The determination of the
interface width between incompatible polymers thus provides a means to obtain accurately
the segment interaction parameter for polymer blend systems, which are otherwise
difficult to determine. Results are compared with other experiments for this blend
system.
PACS: 36.20.Cw – Molecular weights, dispersity / 61.12.Ex – Neutron scattering techniques (including small-angle scattering) / 82.65.Dp – Thermodynamics of surfaces and interfaces
© EDP Sciences, 1996
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