Origin of the thermoreversible fcc-bcc transition in block copolymer solutions

Timothy P. Lodge, Joona Bang, Moon Jeong Park, Kookheon Char

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83 Scopus citations

Abstract

The thermoreversible fcc-bcc transition in concentrated block copolymer micellar solutions was discussed. It was found that temperature-induced changes in micellar characteristics, particularly the mean aggregation number was quantified in dilute solutions. It was demonstrated that the softening of the intermicelle potential with decreasing aggregation number was the key feature. Analysis shows that the observed phase boundary was in excellent agreement with simulations of highly branched star polymers.

Original languageEnglish (US)
Article number145501
Pages (from-to)145501-1-145501-4
JournalPhysical review letters
Volume92
Issue number14
DOIs
StatePublished - Apr 9 2004

Bibliographical note

Funding Information:
This work was supported primarily by the MRSEC Program of the National Science Foundation under Grant No. DMR-0212302, and also in part by the Brain Korea 21 Program endorsed by the Korean Ministry of Education. We acknowledge helpful discussions with C. N. Likos.

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