Direct test of the critical exponents at the sol-gel transition

Demet Kaya, Önder Pekcan, Yaşar Yilmaz*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

The sol-gel transition for the solution-free radical cross-linking polymerization of acrylamide was studied using the steady-state fluorescence technique. Pyranine molecules start to bind to acrylamide polymer chains upon the initiation of the polymerization. Fluorescence spectra from the bonded pyranines allows one to monitor the sol-gel transition, without disturbing the system mechanically. The results indicate that for very low polymer concentrations, the exponents differ considerably from both the percolation and the mean-field values.

Original languageEnglish
Article number016117
Pages (from-to)161171-1611710
Number of pages1450540
JournalPhysical Review E
Volume69
Issue number1 2
Publication statusPublished - Jan 2004

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