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 Tg 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. (c)
Original language | English |
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Pages (from-to) | 1343-1349 |
Number of pages | 7 |
Journal | JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS |
Volume | 51 |
Issue number | 18 |
DOIs | |
State | Published - Sep 15 2013 |
Keywords
- glass transition temperature
- glycerol
- ionic liquid
- liquid dewetting behavior
- polystyrene
- thin films
- viscoelastic properties