Coupling between Molecular Mobility and Kinetics of Crystal Growth in a Hydrogen-Bonded Liquid

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Our aim here is to gain new insight into the nature of the crystalline phase formed in supercooled glycerol near the glass transition temperature and to
establish the interrelationship between the kinetics of crystal growth and
fundamental dynamic properties. The liquid’s dynamics and the crystalline
development in glycerol, a hydrogen-bonded liquid, is studied by means of
dielectric spectroscopy. We monitored the kinetics of crystallization by isothermal
treatment at temperatures between 220 and 240 K (Tg = 185 K). Given the thermal protocol employed, we stimulated the growth of the crystalline phase from preexisting nuclei, in such a way that the observed kinetics is dominated by the crystal growth step. Our experimental results are discussed in terms of the classical theory of crystallization which predicts a significant correlation between the liquid’s diffusion and the crystal growth rate. The coupling between dynamic properties, such as dielectric α relaxation time, viscosity, and self-diffusion coefficient, and the characteristic crystal growth time is analyzed.
We find that the crystal growth time scales with the glycerol’s self-diffusion coefficient as taucryst ∝ D−0.85, confirming that the liquid’s dynamics is the principal factor governing the crystal growth in glycerol above but close Tg.
OriginalsprogEngelsk
TidsskriftCrystal Growth & Design
Vol/bind17
Udgave nummer9
Sider (fra-til)4628-4636
Antal sider9
ISSN1528-7483
DOI
StatusUdgivet - 3 aug. 2017

Bibliografisk note

Artiklen er fundet som Free Access via Semantic Scholar. Skulle denne adgang lukke, kontakt venligst rucforsk@ruc.dk

Citer dette

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title = "Coupling between Molecular Mobility and Kinetics of Crystal Growth in a Hydrogen-Bonded Liquid",
abstract = "Our aim here is to gain new insight into the nature of the crystalline phase formed in supercooled glycerol near the glass transition temperature and toestablish the interrelationship between the kinetics of crystal growth andfundamental dynamic properties. The liquid’s dynamics and the crystallinedevelopment in glycerol, a hydrogen-bonded liquid, is studied by means ofdielectric spectroscopy. We monitored the kinetics of crystallization by isothermaltreatment at temperatures between 220 and 240 K (Tg = 185 K). Given the thermal protocol employed, we stimulated the growth of the crystalline phase from preexisting nuclei, in such a way that the observed kinetics is dominated by the crystal growth step. Our experimental results are discussed in terms of the classical theory of crystallization which predicts a significant correlation between the liquid’s diffusion and the crystal growth rate. The coupling between dynamic properties, such as dielectric α relaxation time, viscosity, and self-diffusion coefficient, and the characteristic crystal growth time is analyzed.We find that the crystal growth time scales with the glycerol’s self-diffusion coefficient as taucryst ∝ D−0.85, confirming that the liquid’s dynamics is the principal factor governing the crystal growth in glycerol above but close Tg.",
author = "Alejandro Sanz and Kristine Niss",
note = "This article has been found as Free Access via Semantic Scholar. Should this aacess close down, please contact rucforsk@ruc.dk",
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Coupling between Molecular Mobility and Kinetics of Crystal Growth in a Hydrogen-Bonded Liquid. / Sanz, Alejandro; Niss, Kristine.

I: Crystal Growth & Design, Bind 17, Nr. 9, 03.08.2017, s. 4628-4636.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Coupling between Molecular Mobility and Kinetics of Crystal Growth in a Hydrogen-Bonded Liquid

AU - Sanz, Alejandro

AU - Niss, Kristine

N1 - This article has been found as Free Access via Semantic Scholar. Should this aacess close down, please contact rucforsk@ruc.dk

PY - 2017/8/3

Y1 - 2017/8/3

N2 - Our aim here is to gain new insight into the nature of the crystalline phase formed in supercooled glycerol near the glass transition temperature and toestablish the interrelationship between the kinetics of crystal growth andfundamental dynamic properties. The liquid’s dynamics and the crystallinedevelopment in glycerol, a hydrogen-bonded liquid, is studied by means ofdielectric spectroscopy. We monitored the kinetics of crystallization by isothermaltreatment at temperatures between 220 and 240 K (Tg = 185 K). Given the thermal protocol employed, we stimulated the growth of the crystalline phase from preexisting nuclei, in such a way that the observed kinetics is dominated by the crystal growth step. Our experimental results are discussed in terms of the classical theory of crystallization which predicts a significant correlation between the liquid’s diffusion and the crystal growth rate. The coupling between dynamic properties, such as dielectric α relaxation time, viscosity, and self-diffusion coefficient, and the characteristic crystal growth time is analyzed.We find that the crystal growth time scales with the glycerol’s self-diffusion coefficient as taucryst ∝ D−0.85, confirming that the liquid’s dynamics is the principal factor governing the crystal growth in glycerol above but close Tg.

AB - Our aim here is to gain new insight into the nature of the crystalline phase formed in supercooled glycerol near the glass transition temperature and toestablish the interrelationship between the kinetics of crystal growth andfundamental dynamic properties. The liquid’s dynamics and the crystallinedevelopment in glycerol, a hydrogen-bonded liquid, is studied by means ofdielectric spectroscopy. We monitored the kinetics of crystallization by isothermaltreatment at temperatures between 220 and 240 K (Tg = 185 K). Given the thermal protocol employed, we stimulated the growth of the crystalline phase from preexisting nuclei, in such a way that the observed kinetics is dominated by the crystal growth step. Our experimental results are discussed in terms of the classical theory of crystallization which predicts a significant correlation between the liquid’s diffusion and the crystal growth rate. The coupling between dynamic properties, such as dielectric α relaxation time, viscosity, and self-diffusion coefficient, and the characteristic crystal growth time is analyzed.We find that the crystal growth time scales with the glycerol’s self-diffusion coefficient as taucryst ∝ D−0.85, confirming that the liquid’s dynamics is the principal factor governing the crystal growth in glycerol above but close Tg.

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