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Titolo:
Semi-interpenetrating polymer networks based on polyaniline and polyvinyl alcohol-glutaraldehyde
Autore:
de Azevedo, WM; de Souza, JM; de Melo, JV;
Indirizzi:
UFPE, CCEN, LQES, Dept Quim Fundamental, BR-50732910 Recife, PE, Brazil UFPE Recife PE Brazil BR-50732910 BCental, BR-50732910 Recife, PE, Brazil
Titolo Testata:
SYNTHETIC METALS
fascicolo: 3, volume: 100, anno: 1999,
pagine: 241 - 248
SICI:
0379-6779(19990426)100:3<241:SPNBOP>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROTEIN IMMOBILIZATION;
Keywords:
interpenetrating polymer network; polyaniline; optical properties; morphology;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: de Azevedo, WM UFPE,E,CEN, LQES, Dept Quim Fundamental, Cidade Univ, BR-50732910 Recife, P UFPE Cidade Univ Recife PE Brazil BR-50732910 BC0 Recife, P
Citazione:
W.M. de Azevedo et al., "Semi-interpenetrating polymer networks based on polyaniline and polyvinyl alcohol-glutaraldehyde", SYNTH METAL, 100(3), 1999, pp. 241-248

Abstract

A new semi-Interpenetrating Polymer Network (semi-IPN) based on polyvinyl alcohol-glutaraldehyde/polyaniline was synthesized and characterized by spectroscopic analysis in the W-Visible-Infrared region and by scanning electron microscopy (SEM). The semi-IPNs exhibit good mechanical properties, characteristic of polyvinyl alcohol-glutaraldehyde polymer network, and excellent optical properties. The UV-Visible results show that the optical properties of the semi-IPNs are characteristic only of polyaniline polymer, and that the semi-IPNs are able to preserve the reduced or oxidized state of polyaniline for several months. The scanning electron microscopy of the semi-IPNs shown that phase separation occurs and the domains formed probably are due to polyaniline particle covered with an adsorbed layer of electrically insulating PVA stabilizer. The domains have a rice-grain morphology with average length of 1 mu m, and average width of 0.5 mu m for less cross-linked samples. The morphology of the phase domains change from rice-grain to spherical shape, as the cross-linking degree increases. (C) 1999 Elsevier Science S.A. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 12:01:17