Hydrophobic microblock length effect on the interaction strength and binding capacity between a partially hydrolyzed microblock hydrophobically associating polyacrylamide terpolymer and surfactant

Abstract

Poly(acrylamide/sodium acrylate/N‐dodecyl acrylamide)s [poly(AM/NaAA/C12AM)s] with different hydrophobic microblock lengths (NH's) were prepared by the micellar copolymerization of acrylamide and sodium acrylate with a low amount of N‐dodecyl acrylamide (0.2 mol %), and the molecular structure was characterized by Fourier transform infrared spectroscopy, 1H‐NMR, and static light scattering. A combination of experiments involving viscosity measurement, fluorescence, and conductometry was applied to investigate the effect of NH on the interaction strength and binding capacity between poly(AM/NaAA/C12AM)s and C12H25SO4Na [sodium dodecyl sulfate (SDS)]. The viscosity, I3/I1 (the intensity ratio of the third vibrational band to the first band of pyrene molecules), and conductivity of the mixed system of copolymers with SDS all had different variation trends with the concentration of SDS. The binding capacity of the copolymers with SDS was calculated according to quantitative differences between the critical micelle concentration of the pure SDS solution and the mixed system. All of the results show that the interaction strength of SDS with the copolymers rose, and the binding capacity decreased with increasing NH. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40633.

Improving the Thermal Stability of Hydrophobic Associative Polymer Aqueous Solution Using a “Triple-Protection” Strategy

“…The synthesis of HAWSPs with certain temperature tolerance is the first step to achieve high temperature resistance of polymer solution. The length of hydrophobic block, molecular weight and its distribution play an important role in the temperature resistance of polymers [5,38,39]. In our previous studies [37], the chain transfer reagent PAM 10 -X1 with high chain transfer constant was added to achieve the “living” polymerization and can effectively control molecular weight and its distribution [40].…”

Chemical enhanced oil recovery and the role of chemical product design

“…The backbone has a polyelectrolyte feature and is composed of a polymer of acrylamide or acrylic acid and ethylacrylate [260,264]. For a deeper study of the chemistry involved in these developments, the reader is kindly referred to the appropriate literature [73,78,79,82,[265][266][267][268][269][270][271][272][273][274][275][276].…”

Preparation and Characterization of Hydrophobic-Associated Microspheres for Deep Profile Control in Offshore Oilfields

“…However, the higher hydrophobe content reduces the lower intrinsic viscosity. It was estimated that the longer hydrophobic block promoted intramolecular hydrophobic interaction between terpolymers [28,29], contributing to decrease its hydrodynamic radius and intrinsic viscosity. Moreover, the higher hydrophobe content weakened the free-radical activity during polymerization because the steric hindrance effect of long-chain DEA was enhanced under the condition of higher DEA content [30,31].…”

“…This was because the terpolymers with an appropriate DEA content in the main chains formed a stronger intermolecular association and higher physical crosslinking density, which resulted in the flow resistance increase of polymer solution. However, the hydrophobic-associated polymers easily transformed from intramolecular association into intermolecular association (critical association concentration) [27][28][29][30][31][32][33], owing to the larger DEA content. Moreover, the decrease of molecular weight in PADD-0.28 reduced the entanglement and association of the polymer, due to the significant steric effects of excessive DEA.…”