Thermodynamic Properties of Some H-Bonded Liquids in their Undercooled and/or Overcompressed States

Alba‐Simionesco, Christiane

doi:10.1007/978-94-011-3274-9_6

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…( 1) and eq. ( 3) gives α P /|α τ | = α P d ln(e(ρ)) d ln(ρ) T τ , which in the case of a power law behavior e(ρ) = ρ x simply reduces to α P • x • T τ , where both α P and T τ depend on P ; usually α P decreases with P [16] and T τ increases with P , leading to a variety of behaviors for α P /|α τ | (see above).…”

Section: Below)mentioning

confidence: 99%

Scaling out the density dependence of the α relaxation in glass-forming polymers

et al. 2004

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We show that the density and temperature dependences of the α-relaxation time of several glassforming polymers can be described through a single scaling variable X = e(ρ)/T , where e(ρ) is well fitted by a power law ρ x , x being a species-specific parameter. This implies that "fragility" is an intrinsic, density-independent property of a glassformer characterizing its super-Arrhenius slowing down of relaxations, and it leads us to propose a modification of the celebrated Angell plot.

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Section: Below)mentioning

confidence: 99%

Scaling out the density dependence of the α relaxation in glass-forming polymers

et al. 2004

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“…(No data either are available for the pressure dependence of these jumps.) For other molecular glassforming liquids, one observes that the heat capacity C P of the liquid at T g slightly increases with pressure: a few % for 3-methylpentane and 1-propanol up to 200 MPa [34], a few % for m-fluoroaniline up to 400 MPa [35], and 10 − 12 % for toluene up to 400 MPa [36]. However, the C P of the glass at T g has been found to also increase in 3-methylpentane and 1-propanol where it has been measured [34], so that the heat capacity jump ∆C P,g (P) barely changes with pressure in these systems.…”

Section: B Thermodynamic Datamentioning

confidence: 99%

Effect of pressure on the number of dynamically correlated molecules when approaching the glass transition

Alba‐Simionesco¹,

Dalle-Ferrier²,

Tarjus³

2013

AIP Conference Proceedings

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We characterize the heterogeneous character of the dynamics of liquids approaching the glass transition through an experimental determination of the number of dynamically correlated molecules N corr as obtained from dynamical susceptibilities. To do so, we have obtained a new set of dielectric spectroscopy data for liquid dibutyl-phtalate on a fine and extended temperature and pressure grid, and we have used it in conjunction with high-pressure data from the literature. We have been able to evaluate the contributions to N corr that are due to fluctuations associated with density and with temperature separately, thereby improving the estimate of N corr . We find that N corr increases along the glass transition line, and more generally along any isochronic line, as pressure increases (up to 1 GPa), a result which is at odds with recent reports and theoretical predictions.

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Thermodynamic and Structural Properties of Fragile Glass-Forming Toluene and Meta-Xylene: Experiments and Monte-Carlo Simulations

Morineau

Dosseh

Pellenq

et al. 1997

Molecular Simulation

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Thermodynamic Properties of Some H-Bonded Liquids in their Undercooled and/or Overcompressed States

Cited by 4 publications

References 19 publications

Scaling out the density dependence of the α relaxation in glass-forming polymers

Scaling out the density dependence of the α relaxation in glass-forming polymers

Effect of pressure on the number of dynamically correlated molecules when approaching the glass transition

Thermodynamic and Structural Properties of Fragile Glass-Forming Toluene and Meta-Xylene: Experiments and Monte-Carlo Simulations

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