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Nonexponential relaxations in strong and fragile glass formers
Open accessAbstract
Deviations from thermally activated and from exponential response are typical features of the vitrification phenomenon and previously have been studied using viscoelastic, dielectric, calorimetric, optical, and other techniques. Linear response data from literature on about 70 covalent glass formers, ionic melts, supercooled liquids, amorphous polymers, and glassy crystals are surveyed. Except for orientational glasses and monohydric aliphatic alcohols a distinct but broad correlation of non-Debye behavior with non-Arrhenius relaxations is found. Within the broad trend several groups of materials, distinguished by their respective molecular complexity, can be identified and are shown to exhibit narrow correlations. At a given degree of deviation from Arrhenius behavior externally imposed stresses are relaxed with a departure from exponential behavior which is stronger the more the molecular or atomic subunits of the glassforming material are interconnected with each other.
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Cited by
Stretched exponential relaxation in molecular and electronic glasses
Phillips, J. C. (1996) · Reports on Progress in Physics · doi:10.1088/0034-4885/59/9/003 · Cited by 938
Structural heterogeneities and mechanical behavior of amorphous alloys
Qiao, J. C., Wang, Q., Pelletier, J. M., Kato, H., Casalini, R., Crespo, D., Pineda, E., Yao, Y., & Yang, Y. (2019) · Progress in Materials Science · doi:10.1016/j.pmatsci.2019.04.005 · Cited by 659
Relaxation dynamics in plastic crystals
Brand, R., Lunkenheimer, P., & Loidl, A. (2002) · The Journal of Chemical Physics · doi:10.1063/1.1477186 · Cited by 337
New insights into the fragility dilemma in liquids
Huang, D., & McKenna, G. B. (2001) · The Journal of Chemical Physics · doi:10.1063/1.1348029 · Cited by 310
Molecular-weight dependence of enthalpy relaxation of PMMA
Andreozzi, L., Faetti, M., Giordano, M., & Zulli, F. (2005) · Macromolecules · doi:10.1021/ma0507037 · Cited by 74
Metadata
- Authors
- Böhmer, R., Ngai, K. L., Angell, C. A., & Plazek, D. J.
- Venue
- The Journal of Chemical Physics
- Publisher
- AIP Publishing
- Published
- 1993-09-01
- Volume
- 99
- Issue
- 5
- Pages
- 4201-4209
- ISSN
- 0021-9606 (ISSN-L)
- 1089-7690
- OpenAlex
- W1983998946
- Cited by
- 2,412
- References
- 0
- FWCI
- 26.99
- Type
- journal article
- Language
- en
- Open access
- green
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- Böhmer, R., Ngai, K. L., Angell, C. A., & Plazek, D. J. (1993). Nonexponential relaxations in strong and fragile glass formers. The Journal of Chemical Physics. https://doi.org/10.1063/1.466117
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