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Confinement effects on the glass transition of hydrogen bonded liquids
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10.1063/1.2793787
/content/aip/journal/jcp/127/19/10.1063/1.2793787
http://aip.metastore.ingenta.com/content/aip/journal/jcp/127/19/10.1063/1.2793787

Figures

Image of FIG. 1.
FIG. 1.

Normalized heat capacities obtained on heating at of bulk glycerol and partially filled (a) and completely filled (b) confined samples in unsilanized nanopores with nominal pore diameters of 2.5, 5.0, and , as indicated.

Image of FIG. 2.
FIG. 2.

Glass transition temperature, , and the fictive temperature, , plotted as a function of the inverse of nominal pore diameter for both bulk glycerol and confined samples in unsilanized nanoporous glass. The dashed line indicates no statistical change with confinement; the solid line represents the best linear fit of the data.

Image of FIG. 3.
FIG. 3.

Difference in of the completely-filled confined glycerol and the bulk plotted as a function of the inverse of nominal pore diameter for unsilanized systems. Results from Jonas and co-workers (Ref. 33), Navrotsky and co-workers (Ref. 34), Kremer and co-workers (Ref. 6), and Richert and co-workers (Ref. 13) are compared. Confinement materials are the same as used in this work unless indicated parenthetically in the legend.

Image of FIG. 4.
FIG. 4.

Normalized heat capacities obtained on heating at of bulk glycerol and partially filled (a) and completely filled (b) confined samples in silanized nanopores with nominal pore diameters of 2.5, 5.0, and , as indicated.

Image of FIG. 5.
FIG. 5.

Glass transition temperature, , and the fictive temperature, , plotted as a function of the inverse of nominal pore diameter for both bulk glycerol and confined samples in silanized nanoporous glass. Data obtained for unsilanized system are also compared. The dashed line indicates no statistical change with confinement; the solid line represents the best linear fit of all the data.

Image of FIG. 6.
FIG. 6.

Normalized heat capacities obtained on heating at of bulk propylene glycol and confined samples in unsilanized (a) and silanized (b) nanopores with nominal pore diameters of 2.5 and , as indicated. The solid lines represent the bulk and the completely filled confined samples; the dotted lines represent the partially filled confined samples.

Image of FIG. 7.
FIG. 7.

Glass transition temperature, , and the fictive temperature, , plotted as a function of the inverse of nominal pore diameter for both bulk propylene glycol and confined samples in unsilanized (a) and silanized (b) nanoporous glass. In (b), data obtained for unsilanized system are also compared. The dashed lines show no statistical change with confinement; the dotted line indicates statistical depression found from the bulk but no size effects observed between confined samples themselves; the solid line represents the best linear fit of all of the data.

Image of FIG. 8.
FIG. 8.

Difference in of the completely filled confined propylene glycol and the first of bulk plotted as a function of the inverse of nominal pore diameter for unsilanized systems. Results from Kremer and co-workers (Refs. 8, 14, and 15), Richert and co-workers (Refs. 7, 11, and 13), Pissis et al. (Refs. 5 and 18), and Swenson et al. (Ref. 10) are included. Open symbols represent the second . Confinement materials are the same as used in this work unless indicated parenthetically in the legend.

Image of FIG. 9.
FIG. 9.

The difference in of the completely-filled confined propylene glycol and the first of bulk plotted as a function of the inverse of nominal pore diameter for silanized systems. Results from Kremer and co-workers (Refs. 14 and 15) and Richert and co-workers (Ref. 7) are included. Open symbols represent the second . Confinement materials are the same as used in this work unless indicated parenthetically in the legend.

Tables

Generic image for table
Table I.

Characteristics of the Gelsil, Vycor, and sol-gel nanoporous glasses.

Generic image for table
Table II.

Summary of the confinement effects on the propylene glycol and glycerol.

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/content/aip/journal/jcp/127/19/10.1063/1.2793787
2007-11-15
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Confinement effects on the glass transition of hydrogen bonded liquids
http://aip.metastore.ingenta.com/content/aip/journal/jcp/127/19/10.1063/1.2793787
10.1063/1.2793787
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