H-bonding in entrapped water in poly(o-methoxyaniline): Results from a differential scanning calorimetry study
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Data
2006-02-15
Autores
De Souza, N. C.
Silva, JR
Giacometti, J. A.
Oliveira, O. N.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
Differential scanning calorimetry (DSC) was used to investigate entrapped water in poly(o-methoxyaniline) (POMA) in powder form. Two endothermic peaks were attributed to removal of water molecules that were adsorbed with distinct energies. By obtaining thermograms at various heating rates, we succeeded in applying Kissinger's approaches to estimate activation energies for the water adsorbed. The values obtained were ca. 25 and 53 kJ/mol, which correspond to H-bonding interactions, probably at the amine and imine centers of POMA, respectively. (C) 2005 Elsevier B.V. All rights reserved.
Descrição
Palavras-chave
poly(o-methoxyaniline), H-bonding, entrapped water, differential scanning calorimetry
Como citar
Thermochimica Acta. Amsterdam: Elsevier B.V., v. 441, n. 2, p. 124-126, 2006.