Static and dynamic crossover in a critical polymer mixture

Frank S. Bates, Jeffrey H. Rosedale, Petr Stepanek, Timothy P. Lodge, Pierre Wiltzius, Glenn H. Fredrickson, Rex P. Hjelm

Research output: Contribution to journalArticlepeer-review

129 Scopus citations

Abstract

A model low-molecular-weight polymer mixture was studied as a function of temperature near the critical point by small-angle neutron scattering (SANS) and dynamic light scattering (DLS). SANS measurements reveal a crossover in the static susceptibility from mean-field to non-mean-field behavior at TxTc+30°C, in quantitative agreement with the Ginzburg criterion. This crossover behavior is also reflected in the DLS experiments, which reveal mode-coupled critical dynamics far into the mean-field regime.

Original languageEnglish (US)
Pages (from-to)1893-1896
Number of pages4
JournalPhysical Review Letters
Volume65
Issue number15
DOIs
StatePublished - Jan 1 1990

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