Probing Glass Transition of Ultrathin Polymer Films at a Time Scale of Seconds Using Fast Differential Scanning Calorimetry

Ultrasensitive, thin-film, differential scanning calorimetry is used to determine the glass-transition temperature of 3−400 nm thick, spin-cast films of polystyrene, poly (2-vinyl pyridine), and poly (methyl methacrylate) on a platinum surface. The technique used here is modified to characterize the...

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Bibliographic Details
Published in:Macromolecules 2004-06, Vol.37 (12), p.4607-4616
Main Authors: Efremov, Mikhail Yu, Olson, Eric A, Zhang, Ming, Zhang, Zishu, Allen, Leslie H
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Thermal and thermodynamic properties
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Summary:Ultrasensitive, thin-film, differential scanning calorimetry is used to determine the glass-transition temperature of 3−400 nm thick, spin-cast films of polystyrene, poly (2-vinyl pyridine), and poly (methyl methacrylate) on a platinum surface. The technique used here is modified to characterize the glass transition over a time scale of seconds rather than milliseconds. No appreciable dependence of the glass-transition temperature on thickness is observed over the entire range used. The results are discussed in comparison with previous calorimetric measurements, characterized by the glass-transition time scale of milliseconds.
ISSN:0024-9297
1520-5835
DOI:10.1021/ma035909r