Metal salts interaction with acrylic acid-maleic acid copolymer: An infrared spectroscopic study

Abstract

A study was carried out in which aqueous solutions of acrylic acid–maleic acid copolymer (mole ratio of monomers: 3:2) were diluted with solutions of various salts [NaCl, MgCl2, CaCl2, SrCl2, ZnCl2, Al(NO3)3 and Fe(NO3)3]. This copolymer was found to interact with all these salts to make solutions of enhanced acidity that infrared spectroscopy suggested was a result of charge stabilization of the polyanion by counterions occupying atmospheric or site‐bound locations. The cations of the salts NaCl, MgCl2, CaCl2 and SrCl2 appeared to occupy atmospheric positions only; in contrast, with poly(acrylic acid) they showed some site binding. Zinc ions, on the other hand, gave identical bridging bidentate interactions with both polymers. The cations from the trivalent salts Al(NO3)3 and Fe(NO3)3 were atmospheric and site bound (bridging bidentate), respectively, and these were also different from their interactions with poly(acrylic acid). The addition of Fe(NO3)3 to the copolymer caused gelation, as with poly(acrylic acid), but formation of the gel was slower and did not result in phase separation. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 1680–1684, 2000

Effect of Ni(II), Cd(II), and Cu(II) metal ions on the crystallinity of poly(maleic anhydride‐alt‐acrylic acid)

“…The polychelates obtained by addition of the copolymer poly(acrylic acid‐ co ‐maleic acid) to aqueous solutions of Cu(II), Co(II), and Ni(II) were characterized by elemental analysis; magnetic, spectral, and thermal properties; and electrical conductivities 3. The interaction of metal salts with acrylic acid–maleic acid copolymer was also studied by infrared spectroscopy 6…”

“…3 The interaction of metal salts with acrylic acid-maleic acid copolymer was also studied by infrared spectroscopy. 6 Recently, the complexation behavior between metal cations and poly(maleic anhydride-alt-acrylic acid) [poly(MA-alt-AA)], in the electrostatic manner of polyelectrolytes, was investigated in aqueous solutions 7 and in solid states 8 by our group. Crystallinity degrees and common structural properties of semicrystalline poly(MA-alt-AA) and poly(MA-co-AAco-vinyl acetate) were investigated by the X-ray powder diffraction method and energy minimization studies.…”

Removal of Sn2+ using copolymer of maleic acid-acrylic acid (PMA) by complexation-ultrafiltration and regeneration of PMA using shear induced dissociation and ultrafiltration

“…Thus, the required dosage of the copolymer is low and it is very economical. Additionally, there are several advantages of PMA, such as good water solubility, high affinity towards target metal ions, non-toxic and low cost [25]. Therefore, PMA as a complexing agent has been proved to be a promising and environment-friendly alternative.…”

Thermal properties of poly(maleic anhydride‐alt‐acrylic acid) in the presence of certain metal chlorides

“…The interaction of poly(acrylic acid maleic acid) with various metal salts was investigated by IR spectroscopy. 13 The synthesis, characterization, and structure of poly(acrylic acid-co-maleic acid)metal complexes with copper(II), cobalt(II), and nickel(II) ions have been assigned to the chelates by elemental analysis, IR spectroscopy, thermal analysis, magnetic susceptibility, and electrical conductivity measurements. 14 In a previous work, 15 we studied the complexation of Cu(II), Ni(II), and Cd(II) ions with poly(maleic anhydride-alt-acrylic acid) [poly(MA-alt-AA)] in aqueous solutions; the stability constants of the obtained polychelates were determined by UV-vis spectroscopy, and the polyelectrolyte behavior of poly(MA-alt-AA) was investigated in the presence of metal salts.…”

“…Poly(acrylic acid maleic acid) is of technical importance as a component of commercial dental cements. The interaction of poly(acrylic acid maleic acid) with various metal salts was investigated by IR spectroscopy 13. The synthesis, characterization, and structure of poly(acrylic acid‐ co ‐maleic acid)–metal complexes with copper(II), cobalt(II), and nickel(II) ions have been assigned to the chelates by elemental analysis, IR spectroscopy, thermal analysis, magnetic susceptibility, and electrical conductivity measurements 14…”