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Complex dynamics in gelling systems |
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| Authors: | L de Arcangelis E Del Gado A Coniglio |
| Institution: | (1) Dipartimento di Ingegneria dell'Informazione, Seconda Università di Napoli, Via Roma 29, 81031 Aversa (CE), Italy, IT;(2) Dipartimento di Scienze Fisiche, Università di Napoli “Federico II”, Complesso Universitario di Monte Sant'Angelo, 80126 Napoli, Italy, IT;(3) INFM Udr di Napoli and Gruppo coordinato SUN, Napoli, Italy, IT |
| Abstract: | We study the viscoelastic properties and the relaxation process in a gelling system by means of a minimal statistical-mechanics model. The model is based on percolation and bond fluctuation dynamics. The values for the critical exponents of the viscosity and elasticity agree with a part of the experimental observations and of the theoretical predictions. The obtained relaxation patterns well reproduce the behaviour observed in different gelling systems. Received 10 March 2002 and Received in final form 30 April 2002 |
| Keywords: | PACS 05 20 -y Classical statistical mechanics – 82 70 Gg Gels and sols – 47 53 +n Fractals |
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