Poly (4-vinylpyridine)/cupric salt complexes: spectroscopic and thermal properties

Copper(II)-containing poly(4-vinylpyridine)(P4VP) blends which form coordination complexes have been investigated through spectroscopy and thermal analysis. The complexes were obtained by mixing the polymer with copper sulfate, copper chloride or copper thiocyanate in a common solvent. Thermal analy...

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Bibliographic Details
Published in:Polymer testing 2004-10, Vol.23 (7), p.839-845
Main Authors: Santana, A.L., Noda, L.K., Pires, A.T.N., Bertolino, J.R.
Format: Article
Language:English
Subjects:
Applied sciences
Blend
Copper complex
Exact sciences and technology
Physicochemistry of polymers
Poly(4-vinylpyridine)
Polymer industry, paints, wood
Technology of polymers
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Summary:Copper(II)-containing poly(4-vinylpyridine)(P4VP) blends which form coordination complexes have been investigated through spectroscopy and thermal analysis. The complexes were obtained by mixing the polymer with copper sulfate, copper chloride or copper thiocyanate in a common solvent. Thermal analysis via differential scanning calorimetry (DSC) was used to evaluate the glass transition of the amorphous polymer-rich phase showing the phase behavior of these binary mixtures at the macroscopic level. Infrared and Raman spectroscopies were used in indirect detection mode to probe microenvironmental factors that influence mixing. The nitrogen ligand of the P4VP is perturbed in blends with Cu(II) ions and anion complexation, due to the accessible structure of the nitrogen atom in the macromolecule chain. The anion influence is strong and the evaluation of the chloride, sulfate and thiocyanate polymer complexes shows distinct thermal properties which suggest different conformations due to coordination effects.
ISSN:0142-9418
1873-2348
DOI:10.1016/j.polymertesting.2004.02.005