A novel temperature-step method to determine the glass transition temperature of ultrathin polymer films by liquid dewetting

Jinhua Wang, Gregory B. McKenna

Research output: Contribution to journalArticle

32 Scopus citations

Abstract

A novel temperature-step experimental method that extends the Bodiguel-Fretigny liquid dewetting method of investigating polymer thin films is described and results presented from an investigation of thickness effects on the glass transition temperature (Tg) of ultrathin polystyrene (PS) films. Unlike most other methods of thin film investigation, this procedure promises a rapid screening tool to determine the overall profile of T g versus film thickness for ultrathin polymer films using a limited number of samples. Similar to our prior observations and other literature data, with this new method obvious Tg depression was observed for PS thin films dewetting on both glycerol and an ionic liquid. The results for PS dewetting on the two different liquids are similar indicating only modest effects of the substrate on the Tg-film thickness relationship. In both instances, the Tg depression is somewhat less than for similar PSs supported on silicon substrates reported in the literature.

Original languageEnglish
Pages (from-to)1343-1349
Number of pages7
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume51
Issue number18
DOIs
StatePublished - Sep 15 2013

Keywords

  • glass transition temperature
  • glycerol
  • ionic liquid
  • liquid dewetting behavior
  • polystyrene
  • thin films
  • viscoelastic properties

Fingerprint Dive into the research topics of 'A novel temperature-step method to determine the glass transition temperature of ultrathin polymer films by liquid dewetting'. Together they form a unique fingerprint.

Cite this