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Gapiński J, Paluch M, Patkowski A. Correlation between nonexponential relaxation and non-Arrhenius behavior under conditions of high compression. Phys Rev E Stat Nonlin Soft Matter Phys. 2002;66(1):011501doi: 10.1103/PhysRevE.66.011501.
Gapiński, J., Paluch, M., & Patkowski, A. (2002). Correlation between nonexponential relaxation and non-Arrhenius behavior under conditions of high compression. Physical review. E, Statistical, nonlinear, and soft matter physics, 66(1), 011501. https://doi.org/10.1103/PhysRevE.66.011501
Gapiński, Jacek, et al. "Correlation between nonexponential relaxation and non-Arrhenius behavior under conditions of high compression." Physical review. E, Statistical, nonlinear, and soft matter physics vol. 66,1 (2002): 011501. doi: https://doi.org/10.1103/PhysRevE.66.011501
Gapiński J, Paluch M, Patkowski A. Correlation between nonexponential relaxation and non-Arrhenius behavior under conditions of high compression. Phys Rev E Stat Nonlin Soft Matter Phys. 2002 Jul;66(1):011501. doi: 10.1103/PhysRevE.66.011501. Epub 2002 Jul 29. PMID: 12241364.
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Phys Rev E Stat Nonlin Soft Matter Phys. 2002 Jul;66(1):011501. doi: 10.1103/PhysRevE.66.011501. Epub 2002 Jul 29.

Correlation between nonexponential relaxation and non-Arrhenius behavior under conditions of high compression.

Physical review. E, Statistical, nonlinear, and soft matter physics

Jacek Gapiński, Marian Paluch, Adam Patkowski

Affiliations

  1. Institute of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Pozna?, Poland.

PMID: 12241364 DOI: 10.1103/PhysRevE.66.011501

Abstract

Photon correlation spectroscopy was used to investigate the behavior of the dynamical properties of 1,1'-di(4-methoxy-5-methyl-phenyl)cyclohexane (BMMPC) at elevated pressures. The fragility of BMMPC measured by the steepness index m(T) is decreasing and the nonexponentiality parameter beta(KWW) is increasing with increasing pressure. This result strongly suggests that the phenomenological correlation between the steepness index and nonexponentionality is also preserved under high compression. The pressure dependence of the structural relaxation times is well characterized by a simple activation volume form. The activation volume continuously increases with decreasing temperature, which is probably due to the increase of cooperativity of the structural relaxation process. Moreover, we found that the glass-transition temperature exhibits a significant dependence on pressure.

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