Cocârță, Ana IrinaGuțanu, VasileDrăgan, Ecaterina Stela2023-11-032023-11-032017COCÂRȚĂ, Ana Irina, GUȚANU, Vasile, DRĂGAN, Ecaterina Stela. Structural, morphological and magnetic characterization of metal-chitosan/poly (vinyl amine) complexes. În: Journal of Polymer Research, 2017, nr. 2(24), pp.1-11. ISSN 1022-97601022-9760https://msuir.usm.md/handle/123456789/11584https://doi.org/10.1007/s10965-016-1182-3Cu2+ and Ni2+ complexes of chitosan/poly(vinyl amine) (CS/PVAm) composites were prepared. The metal-CS/PVAm complexes were characterized by FT-IR spectroscopy, SEM-EDX, X-ray diffraction (XRD), and magnetic moment determination. FT-IR spectra of the metal-CS/PVAm complexes showed the characteristic bands of anhidroglucose unit were affected by the metal complexation, and new bands assigned to Me–N and Me-O bonds were observed. SEM images of the surface of metal-composite complexes show the influence of metal ion on the morphology of the complexes, the strong binding of Cu2+ and Ni2+, involving most of the amino groups, leading to a dense surface structure. The chemical composition on the surface of metal-CS/PVAm complexes was determined from EDX measurements. XRD provided information about the amorphous or crystalline nature of the composite and metal-composite complexes. Using magnetic susceptibility method, the oxidation degree of metal ions from the polymer phase, the homogeneous distribution of the ligand groups from the volume of the CS/PVAm beads, and the existence of the antiferromagnetic interactions between the metal ions were determined.enChitosanPoly (vinyl amine)CompositesMetal complexesMagnetic propertiesArticle