Volume 46, Number 3, May I 1999
|Page(s)||288 - 294|
|Published online||01 September 2002|
Elastic properties at the sol-gel transition
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
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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