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Romanini M, Martinez-Garcia JC, Tamarit JL, et al. Scaling the dynamics of orientationally disordered mixed crystals. J Chem Phys. 2009;131(18):184504doi: 10.1063/1.3254207.
Romanini, M., Martinez-Garcia, J. C., Tamarit, J. L., Rzoska, S. J., Barrio, M., Pardo, L. C., & Drozd-Rzoska, A. (2009). Scaling the dynamics of orientationally disordered mixed crystals. The Journal of chemical physics, 131(18), 184504. https://doi.org/10.1063/1.3254207
Romanini, M, et al. "Scaling the dynamics of orientationally disordered mixed crystals." The Journal of chemical physics vol. 131,18 (2009): 184504. doi: https://doi.org/10.1063/1.3254207
Romanini M, Martinez-Garcia JC, Tamarit JL, Rzoska SJ, Barrio M, Pardo LC, Drozd-Rzoska A. Scaling the dynamics of orientationally disordered mixed crystals. J Chem Phys. 2009 Nov 14;131(18):184504. doi: 10.1063/1.3254207. PMID: 19916609.
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J Chem Phys. 2009 Nov 14;131(18):184504. doi: 10.1063/1.3254207.

Scaling the dynamics of orientationally disordered mixed crystals.

The Journal of chemical physics

M Romanini, J C Martinez-Garcia, J Ll Tamarit, S J Rzoska, M Barrio, L C Pardo, A Drozd-Rzoska

Affiliations

  1. Department de Física I Enginyeria Nuclear, Grup de Caracterització de Materials, ETSEIB, Diagonal 647, Universitat Politècnica de Catalunya, Barcelona 08028, Catalonia, Spain.

PMID: 19916609 DOI: 10.1063/1.3254207

Abstract

The evolution of the primary relaxation time of orientationally disordered (OD) mixed crystals [(CH(3))(2)C(CH(2)OH)(2)](1-X)[(CH(3))C(CH(2)OH)(3)](X), with 0 < X < or = 0.5, on approaching the glass temperature (T(g)) is discussed. The application of the distortion-sensitive, derivative-based procedure revealed a limited adequacy of the Vogel-Fulcher-Tammann parametrization and a superiority of the critical-like description tau proportional to (T - T(C))(-phi(') ), phi(') = 9-11.5, and T(C) approximately T(g) - 10 K. Basing on these results as well as that of Drozd-Rzoska et al. [J. Chem. Phys. 129, 184509 (2008)] the question arises whether such behavior may be suggested as the optimal universal pattern for dynamics in vitrifying OD crystals (plastic crystals). The obtained behavior is in fair agreement with the dynamic scaling model (DSM) [R. H. Colby, Phys. Rev. E 61, 1783 (2000)], originally proposed for vitrifying molecular liquids and polymers. The application of DSM made it possible to estimate the size of the cooperatively rearranging regions ("heterogeneities") in OD phases near T(g).

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