Solution rheology of hydrophobically modified associative polymers: Effects of backbone composition and hydrophobe concentration

2004 ◽  
Vol 48 (5) ◽  
pp. 979-994 ◽  
Author(s):  
Ahmed A. Abdala ◽  
Wenjun Wu ◽  
Keith R. Olesen ◽  
Richard D. Jenkins ◽  
Alan E. Tonelli ◽  
...  
Keyword(s):  
Associative Polymers ◽  
Hydrophobically Modified ◽  
Solution Rheology

Solution rheology of a hydrophobically modified alkali-soluble associative polymer

1997 ◽  
Vol 41 (2) ◽  
pp. 427-444 ◽  
Author(s):  
Robert J. English ◽  
Harpreet S. Gulati ◽  
Richard D. Jenkins ◽  
Saad A. Khan
Keyword(s):  
Hydrophobically Modified ◽  
Solution Rheology ◽  
Associative Polymer

Synthesis, Characterization, and Solution Rheology of Model Hydrophobically-Modified, Water-Soluble Ethoxylated Urethanes

Langmuir ◽  
1994 ◽  
Vol 10 (9) ◽  
pp. 3027-3034 ◽  
Author(s):  
David J. Lundberg ◽  
Richard G. Brown ◽  
J. Edward Glass ◽  
Richard R. Eley
Keyword(s):  
Water Soluble ◽  
Hydrophobically Modified ◽  
Solution Rheology

Influence of hydrophobe content on the solution rheology of hydrophobically modified terpolymer of SO2, N,N-diallyl-N-carboethoxymethylammonium chloride

2005 ◽  
Vol 41 (10) ◽  
pp. 2472-2482 ◽  
Author(s):  
Ibnelwaleed A. Hussein ◽  
M. Sayem Mozumder ◽  
Basel F. Abu Sharkh ◽  
Sk. Asrof Ali ◽  
Raafat Al-Naizy
Keyword(s):  
Hydrophobically Modified ◽  
Solution Rheology

Influence of hydrophobe fraction content on the rheological properties of hydrosoluble associative polymers obtained by micellar polymerization

e-Polymers ◽  
2012 ◽  
Vol 12 (1) ◽  
Author(s):  
Enrique J. Jiménez-Regalado ◽  
Elva B. Hernández-Flores
Keyword(s):  
Relaxation Time ◽  
Rheological Properties ◽  
Polymer Concentration ◽  
Water Soluble ◽  
Polymer Chains ◽  
Associative Polymers ◽  
Hydrophobically Modified ◽  
Viscosity Increase ◽  
Increase Rate ◽  
Micellar Polymerization

AbstractThe synthesis, characterization and rheological properties in aqueous solutions of water-soluble associative polymers (AP’s) are reported. Polymer chains consisting of water-soluble polyacrylamides, hydrophobically modified with low amounts of N,N-dihexylacrylamide (1, 2, 3 and 4 mol%) were prepared via free radical micellar polymerization. The properties of these polymers, with respect to the concentration of hydrophobic groups, using steady-flow and oscillatory experiments were compared. An increase of relaxation time (TR) and modulus plateau (G0) was observed in all samples studied. Two different regimes can be clearly distinguished: a first unentangled regime where the viscosity increase rate strongly depends on hydrophobic content and a second entangled regime where the viscosity follows a scaling behavior of the polymer concentration with an exponent close to 4.

A Structural Model of Hydrophobically Modified Urethane−Ethoxylate (HEUR) Associative Polymers in Shear Flows

1998 ◽  
Vol 31 (13) ◽  
pp. 4149-4159 ◽  
Author(s):  
K. C. Tam ◽  
R. D. Jenkins ◽  
M. A. Winnik ◽  
D. R. Bassett
Keyword(s):  
Shear Flows ◽  
Structural Model ◽  
Associative Polymers ◽  
Hydrophobically Modified

scholarly journals Influence of Hydrophobe, Surfactant and Salt Concentrations in Hydrophobically Modified Alkali-Soluble Polymers Obtained by Solution Polymerization

2017 ◽  
Vol 56 (2) ◽  
Author(s):  
Enrique Javier Jiménez Regalado ◽  
Claudia Cecilia Rivera Vallejo ◽  
Hortensia Maldonado Textle ◽  
Ramiro Guerrero ◽  
Jorge Félix Espinosa Muñoz
Keyword(s):  
Aqueous Solution ◽  
Sodium Dodecyl Sulfate ◽  
Electrostatic Interactions ◽  
Sodium Dodecyl ◽  
Solution Polymerization ◽  
Soluble Polymers ◽  
Associative Polymers ◽  
Hydrophobically Modified ◽  
Modified Polymers ◽  
Hydrophobically Modified Polymers

The viscosity of hydrophobically modified alkali-soluble polymers to different hydrophobic macromonomer concentrations in the presence of various concentrations of anionic surfactant and salt were investigated. Associative polymers containing both ionic sites and small number of hydrophobic groups were prepared, and their thickening properties in aqueous solution were investigated. Solution polymerization was used for obtained the different polymers. Relationships between hydrophobe, sodium dodecyl sulfate (SDS) and salt (NaCl) concentrations are proposed. Owing to the competition between attractive hydrophobic interaction and repulsive electrostatic interactions, such hydrophobically modified polymers exhibit various rheological behaviors in aqueous solution depending on hydrophobic macromonomer, SDS and NaCl concentrations.

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