Dramatic reduction of the effect of nanoconfinement on the glass transition of polymer films via addition of small-molecule diluent

Christopher J. Ellison, Robert L. Ruszkowski, Nathaniel J. Fredin, John M. Torkelson*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

128 Scopus citations

Abstract

The reduction of the effect of nanoconfinement on the glass transition temperature Tg in polymer films was studied via addition of small-molecule diluent. The pyrene-doped polystyrene (PS) films were spin coated onto glass from toluene solutions onto NaCl infrared (IR) crystal windows, transferred to glass in a water reservoir by floating, and dried in ambient conditions for several hours prior to taking measurements. The temperature dependence of fluorescence of PS films was shown as a function of pyrene content. The results indicate that the reduction of Tg in neat PS due to nanoconfinement is suppressed by a high concentration of pyrene diluent.

Original languageEnglish (US)
Article number095702
Pages (from-to)095702-1-095702-4
JournalPhysical review letters
Volume92
Issue number9
DOIs
StatePublished - Mar 5 2004

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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