Volume 57, Number 1, January 2002
|Page(s)||32 - 38|
|Section||Atomic and molecular physics|
|Published online||01 September 2002|
Scaling model for the anomalous swelling of polymer networks in a polymer solvent
Institut de Chemie des Surfaces et Interfaces 15
rue Jean Starcky F-68057 Mulhouse Cedex, France
2 Fakultät für Physik, Universität Freiburg Hermann-Herder-Str. 3, D-79104 Freiburg, Germany
3 Department of Physics and Astronomy, University of Sheffield Hicks Building - Hounsfield Road, Sheffield, S3 7RH, UK
Accepted: 10 October 2001
We present a self-similar model for the topological disorder of randomly cross-linked polymer networks to study swelling in the same melt (P monomers per chain). A partially screened excluded-volume constant explains the anomalous swelling obtained in experiments on polystyrene networks if the characteristic size of the topological disorder (network clusters) is greater than the extension of the P-chains. As a result, the degree of swelling follows a scaling behaviour dependent upon the connectivity of the network clusters, in agreement with our experimental data.
PACS: 36.20.-r – Macromolecules and polymer molecules / 61.25.Hq – Macromolecular and polymer solutions; polymer melts; swelling / 83.80.Va – Elastomeric polymers
© EDP Sciences, 2002
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