Rheology of poly(acrylic acid) in water/glycol/salt mixtures

Yuchen Wang, Richard Pethrick, Nicholas Hudson, Carl Schaschke

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Aqueous mixtures of 1,2-propylene glycol with added poly(acrylic acid), neutralized and with added salt, are used for aircraft deicing. This study reports data on the effects of varying the salt concentration, architecture, and temperature of a series of different mixtures. For a deicing fluid to be effective, it is desirable that it be able to create a liquid layer that is stable under low-shear conditions yet can be completely removed during the initial stages of takeoff. A number of the mixtures examined show a viscosity profile that is either almost independent of temperature or exhibits a peak. To gain a greater understanding of the factors responsible for the observed rheological behavior, a theoretical model was fitted to oscillatory data. Using two fitting parameters, it was possible to describe the changes in the observed behavior, suggesting that, as the temperature is varied, the extent of shielding of carboxylic acid groups and the conformation of the chain balance one another to give an apparent temperature independence of the viscosity. The rheological data were used to interpret the boundary-layer displacement thickness data obtained from wind-tunnel measurements.
LanguageEnglish
Pages594–602
Number of pages9
JournalIndustrial and Engineering Chemistry Research
Volume52
Issue number2
Early online date12 Dec 2012
DOIs
Publication statusPublished - 2013

Fingerprint

carbopol 940
Glycols
Rheology
Acrylics
Snow and ice removal
Salts
Acids
Water
Viscosity
Temperature
Propylene Glycol
Takeoff
Carboxylic Acids
Carboxylic acids
Shielding
Propylene
Wind tunnels
Conformations
Boundary layers
Aircraft

Keywords

  • poly(acrylic acid)
  • rheology
  • water/glycol/salt mixtures

Cite this

Wang, Yuchen ; Pethrick, Richard ; Hudson, Nicholas ; Schaschke, Carl. / Rheology of poly(acrylic acid) in water/glycol/salt mixtures. In: Industrial and Engineering Chemistry Research. 2013 ; Vol. 52, No. 2. pp. 594–602.
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Rheology of poly(acrylic acid) in water/glycol/salt mixtures. / Wang, Yuchen; Pethrick, Richard; Hudson, Nicholas; Schaschke, Carl.

In: Industrial and Engineering Chemistry Research, Vol. 52, No. 2, 2013, p. 594–602.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Rheology of poly(acrylic acid) in water/glycol/salt mixtures

AU - Wang, Yuchen

AU - Pethrick, Richard

AU - Hudson, Nicholas

AU - Schaschke, Carl

PY - 2013

Y1 - 2013

N2 - Aqueous mixtures of 1,2-propylene glycol with added poly(acrylic acid), neutralized and with added salt, are used for aircraft deicing. This study reports data on the effects of varying the salt concentration, architecture, and temperature of a series of different mixtures. For a deicing fluid to be effective, it is desirable that it be able to create a liquid layer that is stable under low-shear conditions yet can be completely removed during the initial stages of takeoff. A number of the mixtures examined show a viscosity profile that is either almost independent of temperature or exhibits a peak. To gain a greater understanding of the factors responsible for the observed rheological behavior, a theoretical model was fitted to oscillatory data. Using two fitting parameters, it was possible to describe the changes in the observed behavior, suggesting that, as the temperature is varied, the extent of shielding of carboxylic acid groups and the conformation of the chain balance one another to give an apparent temperature independence of the viscosity. The rheological data were used to interpret the boundary-layer displacement thickness data obtained from wind-tunnel measurements.

AB - Aqueous mixtures of 1,2-propylene glycol with added poly(acrylic acid), neutralized and with added salt, are used for aircraft deicing. This study reports data on the effects of varying the salt concentration, architecture, and temperature of a series of different mixtures. For a deicing fluid to be effective, it is desirable that it be able to create a liquid layer that is stable under low-shear conditions yet can be completely removed during the initial stages of takeoff. A number of the mixtures examined show a viscosity profile that is either almost independent of temperature or exhibits a peak. To gain a greater understanding of the factors responsible for the observed rheological behavior, a theoretical model was fitted to oscillatory data. Using two fitting parameters, it was possible to describe the changes in the observed behavior, suggesting that, as the temperature is varied, the extent of shielding of carboxylic acid groups and the conformation of the chain balance one another to give an apparent temperature independence of the viscosity. The rheological data were used to interpret the boundary-layer displacement thickness data obtained from wind-tunnel measurements.

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