Early stages of phase separation from polydisperse polymer mixtures

Authors
Citation
N. Clarke, Early stages of phase separation from polydisperse polymer mixtures, EUR PHY J E, 4(3), 2001, pp. 327-336
Citations number
32
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
EUROPEAN PHYSICAL JOURNAL E
ISSN journal
1292-8941 → ACNP
Volume
4
Issue
3
Year of publication
2001
Pages
327 - 336
Database
ISI
SICI code
1292-8941(200103)4:3<327:ESOPSF>2.0.ZU;2-L
Abstract
We study the early stages of phase separation ill a mixture of a polydisper se and a monodisperse polymer within the Cahn-Hilliard framework. We model the polydisperse component using a finite, but arbitrarily large, number of components. and show that the number of components required for convergent behaviour to be achieved is computationally undemanding. We study the grow th rate of fluctuations following a quench into the two-phase region of the phase diagram. The q-dependence of the growth rate is shown to he commensu rate with the behaviour uf a monodisperse-monodisperse mixture, with the ma jor difference being art effective mobility that is dependent on the quench depth. We also study the deviation of the time dependence of the scatterin g function from single exponential behaviour.