Which acid thickeners were prepared by aqueous solution polymerization?

Two acid thickeners, ADMC and ADOM, were prepared by aqueous solution polymerization using acrylamide (AM) and methacryloyloxyethyl trimethyl ammonium chloride (DMC) as raw materials, with or without the introduction of octadecyl polyoxyethylene ether methacrylate (OEMA). It was characterized by FTIR, 1H NMR, and the fluorescence spectra of pyrene.

Which polymer thickening agent is a cationic polyacrylamide?

Zhang et al. , synthesized the polymer thickening agent DXGY-1, which is a cationic polyacrylamide. Its viscosity retention ratio in 12% HCl + 3% HF reached 82%. Liu et al. , synthesized a copolymer from AM, DMDAAC, and AMPS monomers and a cationic monomer X.

Does acid concentration affect acrylamide polymers?

Acrylamide copolymers are often used as acidizing diverting and thickening agents for their advantageous thickening, flocculation, adhesion and resistance reduction properties. Experimental results indicate that the acid concentration greatly affects the properties of acrylamide polymers, which varies from results reported by other researchers.

What is the viscosity of Adom acid thickener in 20 wt% hydrochloric acid?

The viscosity of the 0.8 wt% ADOM acid thickener in 20 wt% hydrochloric acid is 150 mPa·s. At the same time, the mechanism of the two-level self-thickening phenomenon of the ADOM fresh acid solution during high-temperature acidification was studied.

Does hydrochloric acid degrade acrylamide based polymers?

Of the studied solutions, AM-AMPS exhibited the best viscosity maintenance in 10 wt% HCl. The changes in polymer molecular weight indicate that the high concentrations of hydrochloric acid gradually degraded the four acrylamide-based polymers, demonstrating that the modification will have significant effect on their acid resistance.

Does adding acid to polymer solution exacerbate microstructural changes?

Results indicate significant microstructural changes, which were exacerbated by the addition of high-concentration acid. Based on the observed macroscopic and microscopic changes, it was concluded that the addition of acid to polymer solution results in the following alterations.