Linked Life Data

17359133

Source:http://linkedlifedata.com/resource/pubmed/id/17359133

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
8
pubmed:dateCreated
2007-3-15
pubmed:abstractText
We study the structure and the dynamics in the formation of irreversible gels by means of molecular dynamics simulation of a model system where the gelation transition is due to the random percolation of permanent bonds between neighboring particles. We analyze the heterogeneities of the dynamics in terms of the fluctuations of the self-intermediate scattering functions: in the sol phase close to the percolation threshold, we find that this dynamic susceptibility increases with the time until it reaches a plateau. At the gelation threshold this plateau scales as a function of the wave vector k as k(eta-2), with eta being related to the decay of the percolation pair connectedness function. At the lowest wave vector, approaching the gelation threshold it diverges with the same exponent gamma as the mean cluster size. These findings suggest an alternative way of measuring critical exponents in a system undergoing chemical gelation.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Feb
pubmed:issn
0031-9007
pubmed:author
pubmed:issnType
Print
pubmed:day
23
pubmed:volume
98
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
088301
pubmed:year
2007
pubmed:articleTitle
Static and dynamic heterogeneities in a model for irreversible gelation.
pubmed:affiliation
Dipartimento di Scienze Fisiche, Università degli Studi di Napoli Federico II, INFN, CNR-INFM Coherentia and CNISM, via Cinthia, 80126 Naples, Italy.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't