Abstract
solutions, because, in some applications, the polymer is required to be dispersed within a short period of time, during which high-shear mixing is commonly used to achieve the necessary level of homogeneity. The model, which involves consideration of reptation, relaxation of the chains by slippage or loop relaxation, and normal Rouse dynamics, is appropriately adapted to reflect the structural changes of the polymer molecules and then used to identify possible relationships between molecular structure and viscoplastic behavior. The simple theory for flexible polymers is modified to include the possibility of complex formation by association between neighboring polymer molecules. We conclude that, although the model is sensitive to the average molar mass of the polymer, additional and more extensive high-shear-rate data are required to explore fully the validity of the Rouse description. However, the scaling of the viscosity by the addition of an increased friction factor provides a reasonable description of the short-range motions observed.
| Original language | English |
|---|---|
| Pages (from-to) | 16196–16208 |
| Number of pages | 13 |
| Journal | Industrial and Engineering Chemistry Research |
| Volume | 51 |
| Issue number | 50 |
| Early online date | 8 Nov 2012 |
| DOIs | |
| Publication status | Published - 2012 |
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Keywords
- rheology
- poly(acrylic) acid
- model study
Cite this
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Rheology of poly(acrylic) acid : a model study. / Wang, Yuchen; Pethrick, Richard; Hudson, Nicholas; Schaschke, Carl.
In: Industrial and Engineering Chemistry Research, Vol. 51, No. 50, 2012, p. 16196–16208.Research output: Contribution to journal › Article
TY - JOUR
T1 - Rheology of poly(acrylic) acid
T2 - a model study
AU - Wang, Yuchen
AU - Pethrick, Richard
AU - Hudson, Nicholas
AU - Schaschke, Carl
PY - 2012
Y1 - 2012
N2 - In this study, we examine the rheological characteristics of poly(acrylic acid) (PAA) polymers in aqueous solutions at 20 °C using various techniques. We also develop a model to simulate the rheological behavior of the polymer solutions, because, in some applications, the polymer is required to be dispersed within a short period of time, during which high-shear mixing is commonly used to achieve the necessary level of homogeneity. The model, which involves consideration of reptation, relaxation of the chains by slippage or loop relaxation, and normal Rouse dynamics, is appropriately adapted to reflect the structural changes of the polymer molecules and then used to identify possible relationships between molecular structure and viscoplastic behavior. The simple theory for flexible polymers is modified to include the possibility of complex formation by association between neighboring polymer molecules. We conclude that, although the model is sensitive to the average molar mass of the polymer, additional and more extensive high-shear-rate data are required to explore fully the validity of the Rouse description. However, the scaling of the viscosity by the addition of an increased friction factor provides a reasonable description of the short-range motions observed.
AB - In this study, we examine the rheological characteristics of poly(acrylic acid) (PAA) polymers in aqueous solutions at 20 °C using various techniques. We also develop a model to simulate the rheological behavior of the polymer solutions, because, in some applications, the polymer is required to be dispersed within a short period of time, during which high-shear mixing is commonly used to achieve the necessary level of homogeneity. The model, which involves consideration of reptation, relaxation of the chains by slippage or loop relaxation, and normal Rouse dynamics, is appropriately adapted to reflect the structural changes of the polymer molecules and then used to identify possible relationships between molecular structure and viscoplastic behavior. The simple theory for flexible polymers is modified to include the possibility of complex formation by association between neighboring polymer molecules. We conclude that, although the model is sensitive to the average molar mass of the polymer, additional and more extensive high-shear-rate data are required to explore fully the validity of the Rouse description. However, the scaling of the viscosity by the addition of an increased friction factor provides a reasonable description of the short-range motions observed.
KW - rheology
KW - poly(acrylic) acid
KW - model study
U2 - 10.1021/ie302313a
DO - 10.1021/ie302313a
M3 - Article
VL - 51
SP - 16196
EP - 16208
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
SN - 0888-5885
IS - 50
ER -