A neutron reflectometry study of polystyrene network interfaces |
| |
Authors: | M Geoghegan F Boué G Bacri A Menelle DG Bucknall |
| |
Institution: | (1) Laboratoire Léon Brillouin (CEA-CNRS), CE-Saclay, 91191 Gif-sur-Yvette Cedex, France, FR;(2) The Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, UK, GB |
| |
Abstract: | We have used neutron reflectometry to measure interfacial widths between two polystyrene films, where either one or both films
are crosslinked. The observed interfacial width between two networks is larger than the size expected for “dangling ends”,
which suggests motion of heterogeneous regions of the networks. In the case when one of the networks is replaced by a linear
polymer, the interfacial profile can be asymmetric with a diffusion “front” of linear polymer penetrating the network to a
length scale of up to 200 ?. In the case of a more densely crosslinked network and a high molecular weight linear polymer
the interface is symmetric implying negligible penetration.
Received: 4 December 1996 / Revised: 13 October 1997 / Accepted: 23 December 1997 |
| |
Keywords: | PACS 68 35 Ct Interface structure and roughness - 82 70 Gg Gels and sols |
本文献已被 SpringerLink 等数据库收录! |
|