Volume 68, Number 4, November 2004
|Page(s)||543 - 549|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||20 October 2004|
Interdigitation between surface-anchored polymer chains and an elastomer: Consequences for adhesion promotion
Laboratoire de Physique de la Matière Condensée, UMR 7125 CNRS 2438 “Matière et Systèmes Complexes”, Collège de France - 11 Place Marcelin Berthelot 75231 Paris Cedex 05, France
2 Steel Institute, University of Wollongong - Northfields Avenue Wollongong NSW 2522, Australia
Accepted: 23 September 2004
We study the adhesion between a crosslinked elastomer and a flat solid surface where polymer chains have been end-grafted. To understand the adhesive feature of such a system, one has to study both the origin of the grafted layer interdigitation with the network, and the end-grafted chains extraction out of the elastomer when it comes unstuck from the solid surface. We shall tackle here the first aspect for which we develop a partial-interdigitation model that lets us analytically predict a critical surface grafting density beyond which only the thermal fluctuations allow the layer to interdigitate with the elastomer. We then relate this result with recent adhesion measurements.
PACS: 61.41.+e – Polymers, elastomers, and plastics / 68.08.-p – Liquid-solid interfaces
© EDP Sciences, 2004
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