| Issue |
Europhys. Lett.
Volume 61, Number 2, January 2003
|
|
|---|---|---|
| Page(s) | 214 - 220 | |
| Section | Condensed matter: structure, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2003-00215-y | |
| Published online | 01 January 2003 | |
Anomalous scaling of the critical temperature of unmixing with chain length for two-dimensional polymer blends
1
Institut für Physik, WA331, Johannes Gutenberg-Universität D-55099 Mainz, Staudinger Weg 7, Germany
2
Dipartimento di Fisica “E. R. Caianiello”, Università degli Studi di Salerno Via S. Allende, I-84081 Baronissi (SA), Italy
Received:
23
August
2002
Accepted:
28
October
2002
The thermodynamics, structure and the chain configurations of
symmetrical polymer mixtures confined into ultrathin films are
studied by Monte Carlo simulations of the bond fluctuation model.
It is shown that the Flory-Huggins–type scaling of the critical
temperature (
) with chain length N in the bulk
is replaced by a weaker increase, 
, in an
ultrathin film, and this is interpreted in terms of geometric
arguments. The pair-correlation function 
of monomers from
different chains exhibits a pronounced correlation hole, and the
density of intermolecular contacts 
decreases with N
as 
.
PACS: 61.41.+e – Polymers, elastomers, and plastics / 64.75.+g – Solubility, segregation, and mixing; phase separation / 68.60.-p – Physical properties of thin films, nonelectronic
© EDP Sciences, 2003
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.