Rheological Properties of Partially Hydrolyzed Polyacrylamide Solutions

Aı̈t-Kadi, A.; Carreau, Pierre J.; Chauveteau, G.

doi:10.1122/1.549959

Cited by 107 publications

(70 citation statements)

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“…5b shows that viscosity of polymer solutions was reduced by increasing the shear rate and NaCl concentration. These findings also were in line with previous studies (Ait-Kadi et al 1987;Chagas et al 2004;Rashidi et al 2010). By adding NaCl into the polymer solution, the negative charges distributed along the polymer chain were shielded by Na ?…”

Section: The Results Of the Anfis Modelsupporting

confidence: 82%

“…The macromolecules orientation along the flow stream line is a good justification for the observed shear thinning behavior of the solution as has been highlighted by different researchers (Ait-Kadi et al 1987;Ballard et al 1988;Carreau 1972;Chagas et al 2004;Ghannam 1999).…”

Section: The Results Of the Anfis Modelmentioning

confidence: 84%

“…By adding NaCl into the polymer solution, the negative charges distributed along the polymer chain were shielded by Na ? ions and eventually molecules coiled up which led to a lower viscosity for polymer solution (Ait-Kadi et al 1987;Chagas et al 2004;Rashidi et al 2010). Last but not least, it is projected in Fig.…”

Section: The Results Of the Anfis Modelmentioning

confidence: 99%

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Comparison of neuro-fuzzy network and response surface methodology pertaining to the viscosity of polymer solutions

Akbari

Mahmood

Tan

et al. 2017

J Petrol Explor Prod Technol

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This study has utilized the response surface methodology (RSM) and adaptive neuro-fuzzy inference system (ANFIS) approaches for the modeling of polymer solution viscosity. In the absence of reports in the previous study on applying these two approaches, the main objective of this study has been to compare the performance of these methods toward the viscosity modeling of a polymer solution. By utilizing RSM technique, the effects of three independent parameters including shear rate, polymer concentration, and sodium chloride concentration on viscosity of polymer solution were examined. The RSM results showed that all the parameters were not equally important in the polymer solution viscosity. Moreover, analysis of variance (ANOVA) was also carried out and indicated that there was no evidence of lack of fit in the RSM model. As a second approach for polymer solution viscosity modeling, ANFIS was utilized with two rules constructed based on the first-order Sugeno fuzzy approach and trained by back propagation neural networks algorithm. High coefficient of determination (R 2 ) values ( [99%) showed that the prediction ability of both the ANFIS and RSM models was good enough for the response when the interpolation ability of the models was considered. In order to evaluate the extrapolation abilities of the two developed models, two data sets lying beyond the originally considered data were also taken into account. The results showed that their extrapolation predictive ability was poor. The reason could simply be the inherent behavior of the polymeric solution, i.e., the correlational structure seen in the sample used in the training step did not continue outside the sample space.

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Section: The Results Of the Anfis Modelsupporting

confidence: 82%

Section: The Results Of the Anfis Modelmentioning

confidence: 84%

See 1 more Smart Citation

Comparison of neuro-fuzzy network and response surface methodology pertaining to the viscosity of polymer solutions

Akbari

Mahmood

Tan

et al. 2017

J Petrol Explor Prod Technol

View full text Add to dashboard Cite

show abstract

“…A viscosity reduction with the shear rate is noticed for pseudo-plastic or shear thinning fluids. The orientation of macromolecules along the stream line of the flow is considered to be the reason for the pseudo-plastic behavior (Ait-Kadi et al 1987;Ballard et al 1988;Carreau 1972;Chagas et al 2004;Ghannam 1999). For all polymers, a higher polymer concentration gives a solution with a higher viscosity.…”

Section: Resultsmentioning

confidence: 99%

“…The addition of NaCl to the polymer solution shielded the charges on the polymer chain. The molecules then coiled up and resulted in a lower polymer solution viscosity (Ait-Kadi et al 1987;Chagas et al 2004;Rashidi et al 2010). The rate of the decrease in the viscosity began to level off after a particular salinity as all charges on the polymer chain had been screened by the NaCl ions.…”

Section: Effect Of the Nacl Concentration And Shear Rate On The Polymmentioning

confidence: 99%

Experimental investigation of the effect of different process variables on the viscosity of sulfonated polyacrylamide copolymers

Akbari

Mahmood

Tan

et al. 2016

J Petrol Explor Prod Technol

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Increasing the viscosity of injected water by the addition of polymer improves the displacement efficiency during the water flooding process. In this study, a sulfonated polyacrylamide copolymer has been added to salt water. Several parameters, such as polymer concentration, shear rate, NaCl concentration, molecular weight and sulfonation degree, have a significant effect on the polymer solution viscosity. The main objective of this paper is to investigate how the polymer solution viscosity varies with changes in the input parameters so as to identify the relative importance of these parameters. This paper incorporates the Design of Experiments technique using Taguchi's method and the Analysis of Variance (ANOVA) to investigate the effect of process variables on the viscosity of a polymer solution. Five input parameters and six possible interactions have been investigated. The analysis of the experimental results revealed that two input parameters, namely, polymer concentration and shear rate, have the most significant impact on polymer viscosity. Two strong interactions were observed in the (1) NaCl concentration and sulfonation degree and (2) molecular weight and NaCl concentration studies. The results show that the Taguchi method was successful in identifying the main effects and interaction effects. ANOVA further buttresses the results from Taguchi's method by showing a strong similarity in its results.

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Rheological properties of aqueous polyacrylamide solutions

Ghannam

Esmail

1998

J. Appl. Polym. Sci.

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A comprehensive study of the rheological properties of aqueous polyacrylamide solutions was carried out. A RheoStress RS100 Haake rheometer was used in the measurements. The concentration of polyacrylamide ranged from 0.25 to 1.0% by weight. This range is sufficiently wide to cover many of the rheological features of polyacrylamide in the lower range of concentration. The study included measurements of steady shear flow parameters, transient shear stress response, yield stress, thixotropic behavior, creep recovery, dynamic responses, and temperature effects in the range 10-50ЊC.

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Rheological Properties of Partially Hydrolyzed Polyacrylamide Solutions

Cited by 107 publications

References 0 publications

Comparison of neuro-fuzzy network and response surface methodology pertaining to the viscosity of polymer solutions

Comparison of neuro-fuzzy network and response surface methodology pertaining to the viscosity of polymer solutions

Experimental investigation of the effect of different process variables on the viscosity of sulfonated polyacrylamide copolymers

Rheological properties of aqueous polyacrylamide solutions

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