Systematic broadening of the viscoelastic and calorimetric glass transitions in complex glass-forming liquids

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Systematic broadening of the viscoelastic and calorimetric glass transitions in complex glass-forming liquids. / Laukkanen, Olli-Ville; Winter, H. Henning; Soenen, Hilde; Seppälä, Jukka.

julkaisussa: Journal of Non-Crystalline Solids, Vuosikerta 483, 03.2018, s. 10-17.

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Laukkanen, Olli-Ville ; Winter, H. Henning ; Soenen, Hilde ; Seppälä, Jukka. / Systematic broadening of the viscoelastic and calorimetric glass transitions in complex glass-forming liquids. Julkaisussa: Journal of Non-Crystalline Solids. 2018 ; Vuosikerta 483. Sivut 10-17.

Bibtex - Lataa

@article{741af182c5924f32a7ca058f87648677,
title = "Systematic broadening of the viscoelastic and calorimetric glass transitions in complex glass-forming liquids",
abstract = "In this experimental study, we explore the broadening of the glass transition in chemically and structurally complex glass-forming liquids (CGFLs) by means of thermal and rheological characterization techniques. Petroleum fluids with different levels of chemical and structural complexity are used as model materials. Thermal characterization by temperature-modulated differential scanning calorimetry (TMDSC) reveals a systematic increase in the width of the glass transition region ΔT g with increasing chemical and structural complexity. The broadening of the glass transition is also strongly reflected in the linear viscoelastic properties that are measured by small-diameter parallel plate rheometry. Most notably, this is observed as the broadening of the relaxation time spectrum at long times. The recently proposed broadened power-law spectrum model is used to describe the constitutive behavior of the investigated petroleum fluids. In this model, the stretching parameter β serves as a quantitative measure of the spectral broadening. A strong power-law correlation is found between ΔT g and β, manifesting a relationship between the broadness of the calorimetric and viscoelastic glass transition in CGFLs.",
keywords = "Glass-forming liquids, Glass transition, Rheology, Viscoelastic properties, Relaxation time spectrum, Differential scanning calorimetry",
author = "Olli-Ville Laukkanen and Winter, {H. Henning} and Hilde Soenen and Jukka Sepp{\"a}l{\"a}",
year = "2018",
month = "3",
doi = "10.1016/j.jnoncrysol.2017.12.029",
language = "English",
volume = "483",
pages = "10--17",
journal = "Journal of Non-Crystalline Solids",
issn = "0022-3093",
publisher = "Elsevier",

}

RIS - Lataa

TY - JOUR

T1 - Systematic broadening of the viscoelastic and calorimetric glass transitions in complex glass-forming liquids

AU - Laukkanen, Olli-Ville

AU - Winter, H. Henning

AU - Soenen, Hilde

AU - Seppälä, Jukka

PY - 2018/3

Y1 - 2018/3

N2 - In this experimental study, we explore the broadening of the glass transition in chemically and structurally complex glass-forming liquids (CGFLs) by means of thermal and rheological characterization techniques. Petroleum fluids with different levels of chemical and structural complexity are used as model materials. Thermal characterization by temperature-modulated differential scanning calorimetry (TMDSC) reveals a systematic increase in the width of the glass transition region ΔT g with increasing chemical and structural complexity. The broadening of the glass transition is also strongly reflected in the linear viscoelastic properties that are measured by small-diameter parallel plate rheometry. Most notably, this is observed as the broadening of the relaxation time spectrum at long times. The recently proposed broadened power-law spectrum model is used to describe the constitutive behavior of the investigated petroleum fluids. In this model, the stretching parameter β serves as a quantitative measure of the spectral broadening. A strong power-law correlation is found between ΔT g and β, manifesting a relationship between the broadness of the calorimetric and viscoelastic glass transition in CGFLs.

AB - In this experimental study, we explore the broadening of the glass transition in chemically and structurally complex glass-forming liquids (CGFLs) by means of thermal and rheological characterization techniques. Petroleum fluids with different levels of chemical and structural complexity are used as model materials. Thermal characterization by temperature-modulated differential scanning calorimetry (TMDSC) reveals a systematic increase in the width of the glass transition region ΔT g with increasing chemical and structural complexity. The broadening of the glass transition is also strongly reflected in the linear viscoelastic properties that are measured by small-diameter parallel plate rheometry. Most notably, this is observed as the broadening of the relaxation time spectrum at long times. The recently proposed broadened power-law spectrum model is used to describe the constitutive behavior of the investigated petroleum fluids. In this model, the stretching parameter β serves as a quantitative measure of the spectral broadening. A strong power-law correlation is found between ΔT g and β, manifesting a relationship between the broadness of the calorimetric and viscoelastic glass transition in CGFLs.

KW - Glass-forming liquids

KW - Glass transition

KW - Rheology

KW - Viscoelastic properties

KW - Relaxation time spectrum

KW - Differential scanning calorimetry

U2 - 10.1016/j.jnoncrysol.2017.12.029

DO - 10.1016/j.jnoncrysol.2017.12.029

M3 - Article

VL - 483

SP - 10

EP - 17

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

SN - 0022-3093

ER -

ID: 16127829