Europhys. Lett.
Volume 75, Number 2, July 2006
Page(s) 274 - 280
Section Condensed matter: structural, mechanical and thermal properties
Published online 21 June 2006
Europhys. Lett., 75 (2), pp. 274-280 (2006)
DOI: 10.1209/epl/i2006-10106-9

Chain length effects on confined polymer/polymer interfaces

C. Carelli1, R. N. Young2, R. A. L. Jones2 and M. Sferrazza3

1  Laboratoire PPMD, Ecole Supérieure de Physique et Chimie Industrielle Paris, France
2  Department of Physics and Astronomy, University of Sheffield - Sheffield, UK
3  Département de Physique, Université Libre de Bruxelles - Boulevard du Triomphe CP 223, 1050 Bruxelles, Belgium

received 20 January 2006; accepted in final form 29 May 2006
published online 21 June 2006

We explored how the effect of confinement on interfacial fluctuations at the polymer/polymer interface depends on the chain lengths of the macromolecules. Polymer bilayers of polyolefins of various degrees of polymerisation and conditions of miscibility were investigated by performing neutron reflectivity experiments. Our results show that the molecular weight has an important role in influencing the dependence of the interfacial width on film thickness at higher values of the interaction parameter, while for more miscible polymer pairs, and thus broader interfaces, the effect of confinement is not strongly dependent on the chain length.

61.41.+e - Polymers, elastomers, and plastics.
61.12.Ha - Neutron reflectometry.
68.35.Fx - Diffusion; interface formation.

© EDP Sciences 2006