Rheology of aqueous solutions of hydrophobically modified polyacrylamides and surfactants

Hydrophobically Modified Sulfonated Polyacrylamides for IOR: Correlations between Associative Behavior and Injectivity in the Diluted Regime

“…Various techniques have been implemented among which viscosimetry [4][5][6][7][8][9][10][11][12], fluorescence [13][14][15][16], transmission, scanning and environmental scanning electron microscopy (TEM, SEM and ESEM) [16][17][18], 19 F NMR spectroscopy [19,20], neutron scattering [21][22][23][24] and Static and Dynamic Light Scattering (SLS and DLS) [14][15][16][25][26][27][28][29][30][31][32][33][34][35][36][37]. Theoretical approaches have also been proposed to describe HMWSP static [38,39] and dynamic [40] properties.…”

Rheological Properties in Aqueous Solution for Hydrophobically Modified Polyacrylamides Prepared in Inverse Emulsion Polymerization

“…Cram et al [25] reported specific viscosities values up to 1, for hydrophobically modified polyacrylamides synthesized by micellar polymerization, with a molecular weight of 96,000. Penott-Chang et al [27] reported 0 up to 1 × 10 3 mPa⋅s for hydrophobically modified polyacrylamides synthesized by micellar polymerization, with a molecular weight of 4,200,000. Lu et al [24] reported 0 up to 1 × 10 6 mPa⋅s for hydrophobically modified polyacrylamides synthesized by micellar polymerization, with a molecular weight of 340,000.…”

“…was 520000 with a polydispersity index / of 2.0. Viscometric molecular weight was determined and reported as a valid approximation as it has been done elsewhere [27][28][29][30]. The viscosity-average molecular weight, V , of copolymers was calculated from [ ] = 6.31 × 10 −3 0.8…”

Performance and field implementation of a new fracturing fluid consisting of hydrophobically associating polyacrylamide and anionic surfactant

“…However, the solution storage modulus decreased at high surfactant concentration because of further addition of surfactant. Micelles with individual hydrophobes can be formed, which results in the breakdown of the physical crosslinking network structure [18][19][20][21][22].…”