Part 8. Preparation, characterization and metal complexing of poly[(2-hydroxyethyl)-DL-aspartamide] in aqueous solution

ABSTRACT:The synthesis and characterization of poly-(ethylenediaminetetraacetic acid-co-lactose) with pendant carboxylic groups of high molar mass (132 kg mol Ϫ1 ) is described. The polycondensate was hydrolytically and microbiologically degradable with conventional microbiological methods. The metal-complexing properties of the polyester were studied for Cr(III), Fe(III), Co(II), Ni(II), Cu(II), Zn(II), Sr(II), Cd(II), Pb(II), and Al(III) ions in aqueous solution with the liquid-phase polymer-based retention (LPR) method. In addition, the complexing capacity of the Cu(II)-saturated copolymer was determined by thermogravimetric analysis to be 182 mg g Ϫ1 of polymer. According to the retention profiles determined as a function of the filtration factor with LPR in conjunction with inductively coupled plasma spectrometry, Cr(III) and Fe(III) showed a strong interaction with this polymer under these conditions, as indicated by retention values of about 100% at pH 5.

Section: Resultssupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of hydrophilic polymers. IX. Synthesis, biodegradability, and metal complexation of copolymers of ethylenediaminetetraacetic acid dianhydride and lactose

Choi

Geckeler

2003

“…According to the literature, the thermal stability of functional polymers with metals will generally be enhanced. When the polymer interacts with metal ions, the thermal energy supplied to the polymer–metal complex may result in a catalytic role of metal ion to the thermal decomposition of the polymer–metal complex 34…”

Section: Resultsmentioning

confidence: 99%

Novel hydrogels based on itaconic acid and citraconic acid: Synthesis, metal ion binding, and swelling behavior

Jeria‐Orell

Pizarro

Marambio

et al. 2009

Several copolymer hydrogels were prepared from radical copolymerization of 2-hydroxypropyl methacrylate (HPMA) with itaconic acid (IA) and also with citraconic acid (CA) by using different feed ratios. The copolymers were characterized by FTIR, 1 H-NMR, and 13 C-NMR spectroscopy as well as by thermal analysis. The swelling process of the different hydrogels immersed in water at different pH has been studied, and also the swelling of the hydrogels loaded with metal ions (Pb 2þ , Cd 2þ ) was investigated. The metal-binding properties were studied by using the liquid-phase polymer-based retention technique, including studies on the influence of pH on the binding process. The efficiency of these hydrogels for the recovery of metal ions in solution was determined by atomic absorption spectroscopic analysis. The thermal characteristics of these copolymers were studied by using differential scanning calorimetry and thermogravimetric analysis in nitrogen atmosphere. Accordingly, the gels loaded with metal ions showed a slight increase of the thermal decomposition temperature when compared with the pristine gels. The copolymer gel HPMA-co-CA showed a single glass transition temperature, whereas for the copolymer systems, HPMA-co-IA, only the copolymers loaded with Cd 2þ ions showed a glass transition temperature. The morphology of film produced from the copolymers was investigated by scanning electron microscopy, revealing generally smooth surfaces.

“…The thermal stability of polymer–metal complexes depends on the nature of the polymer main chain, coordination bonds, and crosslinking. When the polymer interacts with metal ions, the thermal energy supplied to the polymer–metal complex may result in a catalytic role of metal ion to the thermal decomposition of the polymer–metal complex 18. By the way the thermal stability of functional polymers with metal will generally be enhanced 19–21…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of water‐soluble oligosalicylaldehyde‐sulfanilic acid and its Cu(II), Co(II), Pb(II) complexes

Turaç

Sürme

Şahmetlioğlu

et al. 2008

This work presents the synthesis and characterization of a new water-soluble oligophenol derivative, 4-(2-hydroxybenzylideneamino)benzenesulfanilic acid (OSAL-SA) and its metal complexes. The chemical structure of the water-soluble polymer was characterized by nuclear magnetic resonance ( 1 H NMR) and Fourier transform infrared (FTIR) spectroscopies and thermogravimetric analyses (TGAs). Pb(II), Cu(II), Co(II) complexes of the polymer were also synthesized in methanol. Characterizations of water insoluble polymer-metal complexes were performed by FTIR, flame atomic absorption spectroscopy, and TGA. The conductivity measurements of OSAL-SA and polymer-metal complexes were carried out by the four-probe technique.