J. Phys. II France
Volume 4, Numéro 12, December 1994
Page(s) 2187 - 2196
DOI: 10.1051/jp2:1994255
J. Phys. II France 4 (1994) 2187-2196

Branched polymers in restricted geometry : Flory theory, scaling and blobs

T. A. Vilgis1, P. Haronska2 and M. Benhamou3

1  Max-Planck-Institut für Polymerforschung, Postfach 3148, 55021 Mainz, Germany
2  Max-Planck-Institut für Kolloid- und Grenzflächenforschung, Kantstrasse 55, 14513 Teltow-Seehof, Germany
3  Laboratoire de Physique des Polymères et Phénomènes Critiques, Faculté des Sciences BenM'sick, Casablanca, Marocco

(Received 3 March 1994, revised 26 July 1994, accepted 18 August 1994)

This paper discusses the behavior of polymers with arbitrary connectivity in restricted geometries, such as pores and slaps. The use of Flory theories, blob models and scaling theories for linear chains is well-known and does not lead to any problems, i.e. all three approaches agree with each other. In the case of branched molecules this is not the case and e.g. no blob model exists. Indeed Flory free energies and scaling theories may lead to contradictions, when applied to branched objects and polymeric fractals without further information. In this paper we will suggest a strategy, how to use both in combined form. The such obtained results are sensible scaling forms for the radius of gyration and the filling fraction. It turns out that a blob model can be constructed for branched polymers. This will be demonstrated in the case of randomly branched polymers. It is also shown that the new results for arbitrary connectivity extrapolate to the well-known case of linear chains, i.e. polymers with one-dimensional connectivity and predicts new scaling laws for the case of two-dimensional tethered surfaces.

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