Calorimetric glass transition of ultrathin poly(vinyl methyl ether) films
- Specific heat spectroscopy in the frequency range typically from 1 Hz to 1 kHz with a sensitivity of pJ/K was employed to study the glass transition behavior of ultrathin poly(vinyl methyl ether) (PVME) films with thicknesses ranging from 218 nm down to 12 nm. The amplitude and the phase angle of the complex differential voltage as a measure of the complex heat capacity were obtained as a function of temperature at a given frequency simultaneously. Both spectra are used to determine the dynamic glass transition temperature as a function of both the frequency and the film thickness. As main result no thickness dependence of the dynamic glass transition temperature was observed down to a film thickness of 12 nm within the experimental uncertainty of ±2 K. Further the width of the glass transition is independent of the film thickness which indicates that the extent of the cooperativity is essentially smaller than 12 nm.
MetadatenAutor*innen: | Huajie YinORCiD, Andreas SchönhalsORCiD |
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Dokumenttyp: | Zeitschriftenartikel |
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Veröffentlichungsform: | Verlagsliteratur |
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Sprache: | Englisch |
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Titel des übergeordneten Werkes (Englisch): | Polymer |
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Jahr der Erstveröffentlichung: | 2013 |
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Verlag: | Springer |
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Verlagsort: | Berlin |
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Jahrgang/Band: | 54 |
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Ausgabe/Heft: | 8 |
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Erste Seite: | 2067 |
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Letzte Seite: | 2070 |
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Freie Schlagwörter: | Dynamic glass transition; Poly(vinyl methyl ether); Specific heat spectroscopy |
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DOI: | 10.1016/j.polymer.2013.02.025 |
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ISSN: | 0032-3861 |
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ISSN: | 1873-2291 |
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Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
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Datum der Freischaltung: | 20.02.2016 |
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Referierte Publikation: | Ja |
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Datum der Eintragung als referierte Publikation: | 11.04.2013 |
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