Analysis Characterization and Some Properties of Polyacrylamide Copper Complexes

Dweik, H.; Sultan, Wadie; Sowwan, Mukhles; Makharza, Sami

doi:10.1080/00914030701413280

Cited by 33 publications

(11 citation statements)

References 12 publications

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“…The intensity of the amide I, which is centered at 1649 cm À1 , is due to C¼O stretching vibration, which is quite sensitive to hydrogen bonding. [28] The interaction between Cu þ2 and PNIPAM reduces the strength of hydrogen bonding, which causes a decrease in the magnitude of the dipole moment change and results in a less intense carbonyl band. [29] The position of amide I and amide II bands can change with the variation of the conformation of PNIPAM chains in different solvents.…”

Section: Resultsmentioning

confidence: 99%

Structural and Thermal Analysis of Copper-Doped Poly(N-isopropylacrylamide) Films

Makharza

Auisa

Sharkh

et al. 2010

International Journal of Polymer Analysis and Characterization

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In the present study, the chemical structure of thermoresponsive copper-doped poly(N-isopropylacrylamide) thin films was investigated. The polymer thin films were deposited by spin-coating from a solution containing the polymer on silicon windows. Spin-coating was carried out at certain conditions yielding films of nanometric-scale thickness (170-250 mn). Thermal transitions such as low critical solution temperature (LCST) and glass transition temperature (T g ) of polymer samples with respect to copper concentrations were studied by the differential scanning calorimetry (DSC) technique. Thermograms show that thermal transitions shift to higher temperatures after doping polymer with Cu þ2 . Heat capacity (Cp, J/g. C) also increases as the concentration of Cu þ2 increases. Fourier transform-infrared (FT-IR) spectrum of pure poly(N-isopropylacrylamide) film exhibits several characteristic stretching bands attributed to V as (NH), amide I (C¼O), and amide II (C-N) respectively. The infrared spectrum of the corresponding Cu þ2 -doped polymer thin films showed a significant shift in the characteristic bands compared to that of pure polymer, indicating a strong interaction between Cu þ2 and poly(N-isopropylacrylamide). The UV-visible spectrum of Cu þ2 -doped poly(N-isopropylacrylamide) shows the creation of a new band positions at 276 nm and 278 nm. These bands are absent in the pure polymer spectrum, indicating a complex formation between Cu þ2 and poly(N-isopropylacrylamide). Coil to swollen aggregate formation was investigated by using the tapping mode atomic force microscopy (AFM) technique. Addition of copper ions to the polymer shows a clear change in the morphology of the polymer thin films compared to the morphology of pure poly(N-isopropylacrylamide) prepared with water as solvent, resulting in clusters that approach single nanoparticle behavior.

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Section: Resultsmentioning

confidence: 99%

Structural and Thermal Analysis of Copper-Doped Poly(N-isopropylacrylamide) Films

Makharza

Auisa

Sharkh

et al. 2010

International Journal of Polymer Analysis and Characterization

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“…The formation of metal–polymer complexes creates the opportunity to create new materials such as antiferromagnets, ferromagnets, and ferrimagnets . Electrically conductive plastics can also be synthesized via the complexation of polymers with metals . In addition, copper(II) complexes have some electrochemical applications and play an important role in living organisms and biological systems.…”

Section: Resultsmentioning

confidence: 99%

“…Polymer–metal complexes are used to remove metal ions from wastewaters and to improve the thermal properties of polymers . Plastic may be made electrically conductive after some modifications, and this can be achieved by complexation of polymers . The formation of metal–polymer complexes creates the opportunity to create a new material with improved properties, such as magnetic materials.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Schiff base–containing benzoxazine derivatives

Tımur

Nur

Sıkar

2019

J of Applied Polymer Sci

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The excellent chemical and physical properties of benzoxazine resins and the functionality of Schiff bases were combined in one compound's structure, creating newly designed benzoxazine derivatives that can form complexes with metals. The new type of benzoxazine monomer was synthesized via the ring-closure reaction of formaldehyde, aniline, and three newly designed Schiff bases. The presence of the Schiff base in the molecular structure of these novel benzoxazine monomers enables them to trap metals as the functional compounds, like Cu, from a solution. Thermally initiated polymerization occurs at a lower temperature by the formation of intermolecular and intramolecular hydrogen bonds between imine, oxazine, Schiff base hydroxyl groups, and the newly generated hydroxyl groups. The thermal behavior of the bisbenzoxazine monomers was investigated with Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and differential scanning calorimetry, and then they were cured at 120, 180, and 230 C. According to the magnetic susceptibility, FTIR, scanning electron microscopy with energy dispersive X-ray spectroscopy, TGA, and microwave plasma atomic emission spectroscopy results, it is shown that Cu(II) complexes of the compounds were also succesfully synthesized, and they proved to be successful in catching metal. This is due to the functionality of Schiff bases forming the metal complexation in the compounds. The poly(bisbenzoxazine)s also showed high limiting oxygen index (31-37), low ring-opening temperature (150-190 C), high char yield (35%-49%), and excellent thermal stability, due to the highly crosslinked nature of the polymers.

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“…Polyacrylamide complexation with Cu þ2 ions was characterized by the spectroscopic techniques of FTIR, UV-vis, and DSC and reported previously [12].…”

Section: Experimental Polyacrylamide Doping With Cu þ2 Metal Ionsmentioning

confidence: 99%

Effect of Cu⁺² Doping on the Nano-Scale Surface Roughness of Polyacrylamide Thin Replicas

Sowwan

Magalseh

Ibrahim

et al. 2008

International Journal of Polymeric Materials and Polymeric Biom

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High sensitive non-contact tapping mode atomic force microscopy has been used to study the effect of Cu þ2 doping on the nano-scale surface roughness of polyacrylamide replicas. The study was carried out by determining the root mean square roughness of the polymer surface as a function of doping concentration on glass substrates. Results show that doping with Cu þ2 leads to the formation of multiscale features that increase in size and number with the doping concentration, which results in increasing the surface roughness.

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Analysis Characterization and Some Properties of Polyacrylamide Copper Complexes

Cited by 33 publications

References 12 publications

Structural and Thermal Analysis of Copper-Doped Poly(N-isopropylacrylamide) Films

Structural and Thermal Analysis of Copper-Doped Poly(N-isopropylacrylamide) Films

Synthesis of Schiff base–containing benzoxazine derivatives

Effect of Cu⁺² Doping on the Nano-Scale Surface Roughness of Polyacrylamide Thin Replicas

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Analysis Characterization and Some Properties of Polyacrylamide Copper Complexes

Cited by 33 publications

References 12 publications

Structural and Thermal Analysis of Copper-Doped Poly(N-isopropylacrylamide) Films

Structural and Thermal Analysis of Copper-Doped Poly(N-isopropylacrylamide) Films

Synthesis of Schiff base–containing benzoxazine derivatives

Effect of Cu+2 Doping on the Nano-Scale Surface Roughness of Polyacrylamide Thin Replicas

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Product

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Effect of Cu⁺² Doping on the Nano-Scale Surface Roughness of Polyacrylamide Thin Replicas