| Issue |
Europhys. Lett.
Volume 46, Number 3, May I 1999
|
|
|---|---|---|
| Page(s) | 288 - 294 | |
| Section | General | |
| DOI | https://doi.org/10.1209/epl/i1999-00258-6 | |
| Published online | 01 September 2002 | |
Elastic properties at the sol-gel transition
1
Dipartimento di Scienze Fisiche, Università di Napoli
"Federico II" INFM Sezione di Napoli - Mostra d'Oltremare
pad. 19, 80125 Napoli, Italy
2
Dipartimento di Ingegneria dell'Informazione
Seconda Università di Napoli, INFM Sezione di Napoli via Roma 29,
81031 Aversa (Caserta), Italy
Received:
26
October
1998
Accepted:
22
February
1999
We study the elasticity behaviour at the sol-gel transition with a percolation
dynamic model via computer simulations on a square lattice. From the
fluctuations in the center-of-mass motion of the percolating cluster we
determine the critical behaviour of the macroscopic elastic constant of the
gel phase, growing above the gel point with a critical exponent
. We also study time
autocorrelation functions and find that the relaxation times diverge, as the
percolation threshold is approached from below, with a critical exponent 
.
PACS: 05.20.-y – Classical statistical mechanics / 82.70.Gg – Gels and sols / 83.10.Nn – Polymer dynamics
© EDP Sciences, 1999
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