Abstract
The application of a modified Simon-Glatzel-type relation [Z. Anorg. Allg. Chem. 178, 309 (1929)] for the pressure evolution of the glass temperature is presented, namely, Tg(P)=Tg0[1+ΔP∕(π+Pg0)]1∕bexp[−(ΔP∕c)], where (Tg0,Pg0) are the reference temperature and pressure, ΔP=P−Pg0, −π is the negative pressure asymptote, b is the power exponent, and c is the damping pressure coefficient. The discussion is based on the experimental Tg(P) data for magmatic silicate melt albite, polymeric liquid crystal P8, and glycerol. The latter data are taken from Cook et al. [J. Chem. Phys. 100, 5178 (1994)] and from the authors’ dielectric relaxation time (τ(P)) measurements, which employs the novel pressure counterpart of the Vogel-Fulcher-Tammann equation: τ(P)=τ0Pexp[DPΔP∕(P0−P)], where ΔP=P−PSL (PSL is the stability limit hidden under negative pressure), P0 is the estimation of the ideal glass pressure, and DP is the isothermal fragility strength coefficient. Results obtained suggest the hypothetical maximum of the Tg(P) curve, which can be estimated due to the application of the supporting derivative-based analysis. A hypothetical common description of glass formers characterized by dTg∕dP>0 and dTg∕dP<0 coefficients is suggested. Finally, the hypothetical link between molecular and colloidal glass formers is recalled.
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Dates
Type | When |
---|---|
Created | 18 years, 3 months ago (April 26, 2007, 9:45 a.m.) |
Deposited | 2 years ago (July 31, 2023, 5:03 p.m.) |
Indexed | 3 weeks ago (Aug. 2, 2025, 1:05 a.m.) |
Issued | 18 years, 3 months ago (April 25, 2007) |
Published | 18 years, 3 months ago (April 25, 2007) |
Published Online | 18 years, 3 months ago (April 25, 2007) |
Published Print | 18 years, 3 months ago (April 28, 2007) |
@article{Drozd_Rzoska_2007, title={On the glass temperature under extreme pressures}, volume={126}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.2721044}, DOI={10.1063/1.2721044}, number={16}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Drozd-Rzoska, A. and Rzoska, S. J. and Paluch, M. and Imre, A. R. and Roland, C. M.}, year={2007}, month=apr }