This article has an erratum: [https://doi.org/10.1209/epl/i2005-10140-1]
Volume 63, Number 1, July 2003
|139 - 145
|Interdisciplinary physics and related areas of science and technology
|01 June 2003
Role of cross-links in bundle formation, phase separation and gelation of long filaments
Department of Material and Interfaces, Weizmann Institute of Science 76100 Rehovot, Israel
Accepted: 6 May 2003
We predict the thermodynamic and structural behavior of solutions of self-assembling chains, cross-links and end-cap molecules. We find that at the mean-field level, the entropy of self-assembled junctions induces an effective attraction that can result in equilibrium between a sol phase and a connected network. A connected network can also be formed in a non-thermodynamic transition upon increase of the monomer or cross-link density, or with decreasing temperature. For rigid rods, at low temperatures, we predict a transition from an isotropic network to anisotropic bundles of rods linked by cross-links, that is triggered by the interplay between the configurational entropy of the cross-link distribution, and the rotational and translational entropy of the rods.
PACS: 82.70.Gg – Gels and sols / 05.70.Fh – Phase transitions: general studies / 87.15.-v – Biomolecules: structure and physical properties
© EDP Sciences, 2003
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