Preparation and Application of Poly(Acrylic Acid-co-Acrylamide) on Scale and Corrosion Inhibition

Abstract

This research is focused on the synthesis and the ability to inhibit scale and corrosion of poly(acrylic acid-co-acrylamide) (PAA-AM copolymers). A series of polymers were synthesized by free radical polymerization having various weight ratios of acrylic acid (AA) to acrylamide (AM). The structures of the synthesized polymers were characterized by UV-Vis Spectroscopy, FT-IR, and 1H-NMR. The thermal stability of the polymers was analyzed by a TGA technique. The water solubility of the polymers was examined using a turbidity meter. The scale inhibition performance test was performed by titration of calcium ion with ethylene diamine tetraacetic acid (EDTA) solution. After that, the crystal structure of CaCO3 scale from the scale inhibition test was examined using a scanning electron microscope. The efficiency of the corrosion inhibitor on low carbon steel AISI 1018 was investigated by a potentiodynamic polarization technique. The result show that PAA-AM copolymers having a 9:1 weight ratio with 45.82% at 100 ppm inhibited scale forming. The corrosion resistance of all inhibitors could be achieved when the concentration of the inhibitor was lower than 100 ppm.

A Strong and Double‐sided Self‐Adhesive Hydrogel Sensor

“…The chemical component of hydrogels was demonstrated by Fourier transform infrared spectroscopy (FTIR), as illustrated in Figure S1, Supporting Information. The peaks that appeared at 3334, 3184, and 1616 cm −1 are characteristic vibration peaks of carboxy, acylamino, and carbonyl groups [ 35 ] in PAA‐PAM/Fe 3+ hydrogel, respectively. For the double‐sided self‐adhesive hydrogel, the peak of carboxy groups shifted to a higher wavenumber of 3421 cm −1 .…”

Preparation of Crude Turmeric Extract Loaded Poly(Acrylamide-<i>co</i>-Acrylic Acid) Microspheres for Drug Release System

“…The white solid product is washed twice with acetone to remove the residue emulsifier and the white solid product is obtained with 95% yield after dried in vacuum oven and desiccator. The other polymer ratios are prepared following by the mole ratios of monomer as shown in Table 1 [12,13].…”

Preparation and Stabilization of High Molecular Weight Poly (acrylonitrile-co-2-methylenesuccinamic acid) for Carbon Fiber Precursor

“…However, in the polymerization process, the carboxyl groups in IA can trap free radicals and then bind to them and release protons (H + ), which is not conducive to the improvement of the molecular weight of the polymer, and it has a significant effect on promoting the tensile strength of the final carbon fiber. In recent years, the acrylamide (AM) [12][13][14] has attracted the attention of researchers due to its unique properties. The nitrogen atom of the amide group can carry out a nucleophilic attack on the adjacent carbon atoms of the nitrile group, which can improve the solubility of PAN and can initiate the cyclization reaction of the nitrile group through an ion mechanism.…”