J. Phys. II France
Volume 4, Numéro 5, May 1994
Page(s) 819 - 824
DOI: 10.1051/jp2:1994166
J. Phys. II France 4 (1994) 819-824

Effects of inhomogeneities of cross-links on a microphase separation of polymer mixtures

S. Stepanow1, M. Schulz2 and K. Binder3

1  Martin-Luther-Universitüt Halle-Wittenberg, Fachbereich Physik, Friedemann-Bach-Platz, D-06108 Halle/Saale, Germany
2  Department of Chemistry, State University of New York at Albany, Albany, NY 12222, U.S.A.
3  Institut für Physik, Johannes-Gutenberg-Universität Mainz, Staudinger Weg 7, D-55099 Mainz, Germany

(Received 22 September 1993, received in final form 1 February 1994, accepted 7 February 1994)

We generalize de Gennes' theory of the microphase separation of cross-linked polymer mixtures to take into account the spatial fluctuations of the elasticity constant c, preventing the mixture from complete segregation. Within a mean-field analysis we found that the spatial fluctuations of c(r), which are assumed to obey the Poisson distribution, enlarge the size of the domains. The latter is obtained to be temperature dependent.

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