The rheological properties of aqueous polyacrylamide
The findings resulted in several conclusions regarding the rheological properties of polyacrylamide solutions. They have shown a strong shear-thinning behavior for all concentrations. The dynamic viscosity showed two different behaviors--shear-thinning region and shear-thickening region.
Rheological properties of aqueous polyacrylamide solutions have been measured in shear and extensional flows. Elongational viscosity measurements were performed with an opposed-nozzles stressmeter.
Rheological properties of aqueous polyacrylamide/NaCl
Rheological properties of aqueous polyacrylamide‐sodium chloride solutions are studied using RheoStress RS100. Polyacrylamide concentration was varied from 0.25 to 1.0% by weight, whereas sodium chloride ranged from 0.0 to 10 g L −1. This range of concentrations is suitable to study many of the polyacrylamide‐sodium chloride rheological properties.
Inverse emulsion polymerization technique was employed to synthesize hydrophobically modified polyacrylamide polymers with hydrophobe contents near to feed composition. Three different structures were obtained: multisticker, telechelic, and combined. N-Dimethyl-acrylamide (DMAM), n-dodecylacrylamide (DAM), and n-hexadecylacrylamide (HDAM) were used as hydrophobic comonomers. The effect of the
Oscillatory and steady shear rheological properties
Rheological measurements were performed for the aqueous solutions of polyacrylamide (M v ¯ = 8 × 10 6) in the concentration range of 0.25% - 0.6% (wt./vol.) using Modular Compact Rheometer (MCR-102) of Anton Paar GmbH, Graz, Austria. The measurements were carried out in the temperature range of 5–45 °C, using cone and plate geometry (50 mm diameter, cone angle 1°) attached to MCR 102.
Rheological properties of the obtained polymer solutions were evaluated and compared to those of solutions of a commercial polyacrylamide currently used in the petroleum industry.
Comparative studies of rheological properties
In the present work, the atomic force microscopy (AFM) studies and rheological properties of aqueous solutions of microcrystalline chitosan (MCCh), polyacrylamide (PAM) and their mixtures at
Inverse emulsion polymerization technique was employed to synthesize hydrophobically modified polyacrylamide polymers with hydrophobe contents near to feed composition. Three different structures were obtained: multisticker, telechelic, and combined. N-Dimethyl-acrylamide (DMAM), n-dodecylacrylamide (DAM), and n-hexadecylacrylamide (HDAM) were used as hydrophobic comonomers.
Enhancing rheological properties of hydrophobically
Enhancing rheological properties of hydrophobically associative polyacrylamide aqueous solutions by hybriding with silica nanoparticles Dingwei Zhu Center for Macromolecular Sciences, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, 610041 People's Republic of China
Rheological Properties in Aqueous Solution for Hydrophobically Modified Polyacrylamides Prepared in Inverse Emulsion Polymerization. International Journal of Polymer Science 2017, 2017, 1-13. DOI: 10.1155/2017/8236870. Pengpeng Qi, Daniel H. Ehrenfried, Heesong Koh, Matthew T. Balhoff.
Rheological Properties of Partially Hydrolyzed
An experimental study was conducted to investigate the effect of salt on viscoelastic properties of partially hydrolyzed polyacrylamide Pusher 700 (Dow Chemical) in aqueous solutions. Viscosity η and primary normal stress differences N 1, were measured on a Weissenberg rheogoniometer and a Contraves low‐shear viscometer. The experimental results show the well known stabilizing effect of
An experimental study was conducted to investigate the effect of salt on viscoelastic properties of partially hydrolyzed polyacrylamide Pusher 700 (Dow Chemical) in aqueous solutions. Viscosity η and primary normal stress differences N1, were measured on a Weissenberg rheogoniometer and a Contraves low‐shear viscometer. The experimental results show the well known stabilizing effect of salt
- Can nonionic polyacrylamide be used as a gel fracturing fluid?
- Nonionic polyacrylamide (NPAM) with controlled molecular weight was successfully synthesized as a gel fracturing fluid by aqueous solution polymerization.
- Does anionic polyacrylamide improve coagulation-flocculation process?
- Aguilar, M. I. et al. Improvement of coagulation-flocculation process using anionic polyacrylamide as coagulant aid. Chemosphere 58, 47–56 (2005). Muller, G., Fenyo, J. C. & Selegny, E. High molecular weight hydrolyzed polyacrylamides.
- What is high molecular weight polyacrylamide (PAM)?
- Provided by the Springer Nature SharedIt content-sharing initiative High molecular weight (106–3 × 107 Da) polyacrylamide (PAM) is commonly used as a flocculant in water and wastewater treatment, as a soil conditioner, and as a viscosity modifier and friction reducer in both enhanced oil recovery and high volume hydraulic fracturing.
- Does biological filtration improve polyacrylamide biodegradation?
- Freedman, D. E. et al. Biologically active filtration for fracturing flowback and produced water treatment. J. Water Process Eng. 18, 29–40 (2017). Dai, X. et al. Waste-activated sludge fermentation for polyacrylamide biodegradation improved by anaerobic hydrolysis and key microorganisms involved in biological polyacrylamide removal.
