DOI: 10.1002/bbpc.19961000904. Structural relaxation of glass‐formers confined to sol‐gel‐type porous glasses

Structural relaxation of glass‐formers confined to sol‐gel‐type porous glasses

10.1002/bbpc.19961000904

Crossref journal-article

Wiley

Berichte der Bunsengesellschaft für physikalische Chemie (311)

Abstract

AbstractWe combine the results of dielectric relaxation spectroscopy and solvation dynamics measurements for the glass‐forming liquid 2‐methyltetrahydrofuran spatially confined to the pores of sol‐gel glasses with pore diameters ϕ = 2.5, 5.0, and 7.5 nm. Although both techniques probe the orientational polarization of the polar liquid, a dielectric experiment is bound to sense macroscopic effects, whereas the solvation method probes the molecular dynamics on microscopic scales. When the temperature approaches the glass‐transition at Tg upon cooling, an interfacial liquid layer with strongly frustrated dynamics grows in thickness and is thus able to block the connectivity among the pores. As a result the structural α‐process is subject to an enhanced spatial restriction near Tg and a transition from constant pressure to constant volume conditions might occur as the pore connectivity becomes obstructed by immobile liquid.

Bibliography

Yan, X., Streck, C., & Richert, R. (1996). Structural relaxation of glassâformers confined to solâgelâtype porous glasses. Berichte Der Bunsengesellschaft FÃ¼r Physikalische Chemie, 100(9), 1392â1395. Portico.

Authors 3

X. Yan (first)
C. Streck (additional)
R. Richert (additional)

References 10 Referenced 12

{'key': 'e_1_2_1_2_2', 'volume-title': 'Molecular Dynamics in Restricted Geometries', 'author': 'Klafter J.', 'year': '1989'} / Molecular Dynamics in Restricted Geometries by Klafter J. (1989)
10.1007/978-3-642-78576-4
10.1063/1.469071
10.1103/PhysRevLett.73.2224
10.1103/PhysRevB.52.15232
M.Arndt R.Stannarius W.Gorbatschow andF.Kremer Phys. Rev. Asubmitted.
10.1016/0009-2614(94)01032-3
10.1016/0009-2614(92)80131-T
10.1103/PhysRevB.53.5341
10.1039/tf9706600080

Dates

Type	When
Created	13 years, 1 month ago (July 26, 2012, 4:48 a.m.)
Deposited	1 year, 10 months ago (Oct. 26, 2023, 7:04 p.m.)
Indexed	1 year, 6 months ago (Feb. 10, 2024, 8:40 p.m.)
Issued	29 years ago (Sept. 1, 1996)
Published	29 years ago (Sept. 1, 1996)
Published Online	15 years, 3 months ago (May 8, 2010)
Published Print	29 years ago (Sept. 1, 1996)

Funders 0

None

BibTeX

@article{Yan_1996, title={Structural relaxation of glass‐formers confined to sol‐gel‐type porous glasses}, volume={100}, ISSN={0005-9021}, url={http://dx.doi.org/10.1002/bbpc.19961000904}, DOI={10.1002/bbpc.19961000904}, number={9}, journal={Berichte der Bunsengesellschaft für physikalische Chemie}, publisher={Wiley}, author={Yan, X. and Streck, C. and Richert, R.}, year={1996}, month=sep, pages={1392–1395} }

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