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

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

Enhancement of the Solubility and Efficacy of Poorly Water-Soluble Drugs by Hydrophobically-Modified Polysaccharide Derivatives

2007 ◽  
Vol 24 (12) ◽  
pp. 2317-2326 ◽  
Author(s):  
Widad Henni-Silhadi ◽  
Michel Deyme ◽  
Marie-Martine Boissonnade ◽  
Martine Appel ◽  
Didier Le Cerf ◽  
...  
Keyword(s):  
Water Soluble ◽  
Poorly Water Soluble Drugs ◽  
Hydrophobically Modified ◽  
Water Soluble Drugs ◽  
Poorly Water Soluble ◽  
Polysaccharide Derivatives

Flow of Hydrophobically Modified Water-Soluble-Polymer Solutions in Porous Media: New Experimental Insights in the Diluted Regime

SPE Journal ◽  
2010 ◽  
Vol 16 (01) ◽  
pp. 43-54 ◽  
Author(s):  
Guillaume Dupuis ◽  
David Rousseau ◽  
René Tabary ◽  
Bruno Grassl
Keyword(s):  
Oil Recovery ◽  
Polymer Concentration ◽  
Adsorbed Layer ◽  
Water Soluble ◽  
Water Soluble Polymer ◽  
Improved Oil Recovery ◽  
Water Soluble Polymers ◽  
Resistance Factors ◽  
Soluble Polymers ◽  
Hydrophobically Modified

Summary The specific molecular structure of hydrophobically modified water-soluble polymers (HMWSPs), also called hydrophobically associative polymers, gives them interesting thickening and surface-adsorption abilities compared with classical water-soluble polymers (WSPs), which could be useful in polymer-flooding and well-treatment operations. However, their strong adsorption obviously can impair their injectivity, and, conversely, the shear sensitivity of their gels can be detrimental to well treatments. Determining for which improved-oil-recovery (IOR) application HMWSPs are best suited, therefore, remains difficult. The aim of this work is to bring new insight regarding the interaction mechanisms between HMWSPs and rock matrix and the consequences concerning their propagation in reservoirs. A consistent set of HMWSPs with sulfonated polyacrylamide backbones and alkyl hydrophobic side chains together with an equivalent WSP was synthesized and fully characterized. HMWSP and WSP solutions were then injected in model granular packs. As expected, with HMWSPs, high resistance factors (or mobility reductions, Rm) were observed. Yet, within the limit of the injected volumes, the effluent showed the same viscosity and polymer concentration as the injected solutions. A first significant outcome concerns the specificities of the Rm curves during HMWSP injections. Rm increases took place in two steps. The first corresponded to the propagation of the viscous front, as observed with WSP, whereas the second was markedly delayed, occurring several pore volumes (PV) after the breakthrough. This result is not compatible with the classical picture of multilayer adsorption of HMWSPs but suggests that injectivity is controlled solely by the adsorption of minor polymeric species. This hypothesis was confirmed by reinjecting the collected effluents into fresh cores; no second-step Rm increases were observed. Brine injections in HMWSP-treated cores revealed high residual resistance factors (or irreversible permeability reductions, Rk), which can be attributed to the presence of thick polymer-adsorbed layers on the pore surface. Nevertheless, Rk values strongly decreased when increasing the brine-flow rate. This second significant outcome shows that the adsorbed-layer thickness is shear-controlled. These new results should lead to proposing new adapted filtration and injection procedures for HMWSPs, aimed, in particular, at improving their injectivity.

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

Luminescence studies of the conformational behaviour of hydrophobically-modified, water-soluble polymers

1994 ◽  
Vol 79 (1) ◽  
pp. 167-177 ◽  
Author(s):  
John R. Ebdon ◽  
David M. Lucas ◽  
Ian Soutar ◽  
Linda Swanson
Keyword(s):  
Water Soluble ◽  
Water Soluble Polymers ◽  
Soluble Polymers ◽  
Hydrophobically Modified

Effect of helix-coil transition on association behavior of both-ends hydrophobically-modified water-soluble polypeptide

Polymer ◽  
2005 ◽  
Vol 46 (23) ◽  
pp. 10035-10044 ◽  
Author(s):  
Katsuhiro Inomata ◽  
Masako Kasuya ◽  
Hideki Sugimoto ◽  
Eiji Nakanishi
Keyword(s):  
Water Soluble ◽  
Hydrophobically Modified ◽  
Coil Transition ◽  
Association Behavior

Association of hydrophobically modified poly (N,N-dimethylacrylamide hydroxyethylmethacrylate) with water soluble β-cyclodextrin polymers

1999 ◽  
Vol 155 (2-3) ◽  
pp. 177-188 ◽  
Author(s):  
Noëlle Martine Gosselet ◽  
Flavie Beucler ◽  
Estelle Renard ◽  
Catherine Amiel ◽  
Bernard Sebille
Keyword(s):  
Water Soluble ◽  
Hydrophobically Modified ◽  
Cyclodextrin Polymers
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