Europhys. Lett.
Volume 63, Number 1, July 2003
Page(s) 1 - 7
Section General
Published online 01 June 2003
DOI: 10.1209/epl/i2003-00468-4
Europhys. Lett., 63 (1) , pp. 1-7 (2003)

A unifying model for chemical and colloidal gels

E. Del Gado1, 2, A. Fierro1, 2, L. de Arcangelis3, 2 and A. Coniglio1, 2

1  Dipartimento di Scienze Fisiche, Università di Napoli "Federico II" Complesso Universitario di Monte Sant'Angelo - via Cintia, 80126 Napoli, Italy
2  INFM Udr di Napoli and Gruppo coordinato SUN - Napoli, Italy
3  Dipartimento di Ingegneria dell'Informazione, Seconda Università di Napoli via Roma 29, 81031 Aversa (Caserta), Italy

(Received 7 February 2003; accepted in final form 8 May 2003)

We investigate the slow dynamics in gelling systems by means of Monte Carlo simulations on the cubic lattice of a minimal statistical mechanics model. By opportunely varying some model parameter we are able to describe a crossover from the chemical gelation behaviour to dynamics more typical of colloidal systems. The results suggest a novel connection linking classical gelation, as originally described by Flory, to more recent results on colloidal systems.

05.20.-y - Classical statistical mechanics.
82.70.Gg - Gels and sols.
47.50.+d - Non-Newtonian fluid flows.

© EDP Sciences 2003