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Titolo:
UV-Vis, IR and XPS analysis of UV induced changes in PVC composites
Autore:
Birer, O; Suzer, S; Sevil, UA; Guven, O;
Indirizzi:
Bilkent Univ, Dept Chem, TR-06533 Bilkent, Turkey Bilkent Univ Bilkent Turkey TR-06533 Dept Chem, TR-06533 Bilkent, Turkey Hacettepe Univ, Dept Chem, TR-06531 Ankara, Turkey Hacettepe Univ AnkaraTurkey TR-06531 Dept Chem, TR-06531 Ankara, Turkey
Titolo Testata:
JOURNAL OF MOLECULAR STRUCTURE
, volume: 483, anno: 1999,
pagine: 515 - 518
SICI:
0022-2860(19990525)483:<515:UIAXAO>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Keywords:
polyaniline; poly(vinylchloride); dehydrochlorination; photochemistry;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
8
Recensione:
Indirizzi per estratti:
Indirizzo: Suzer, S Bilkent Univ, Dept Chem, TR-06533 Bilkent, Turkey Bilkent Univ Bilkent Turkey TR-06533 , TR-06533 Bilkent, Turkey
Citazione:
O. Birer et al., "UV-Vis, IR and XPS analysis of UV induced changes in PVC composites", J MOL STRUC, 483, 1999, pp. 515-518

Abstract

PVC undergoes a high degree of dehydrochlorination when exposed to energetic photons. The released HCl (acid), however, can be trapped if a suitable trapping material (base) is also enclosed within the solid matrix as a result of formation an acid-base adduct. Color changes or electrical conductivity changes can easily be obtained if suitable acid-base indicators or conducting polymers in their basic (nonconducting) form are enclosed in the matrix as trapping materials. We used bromcresol green and polyaniline for inducing color and electrical conductivity changes, respectively, within the PVC matrix as a result of exposure to UV light at 254 nm. Both changes can tosome extent be reversed by further exposure of the films to NH3 vapour. The color and electrical conductivity changes and their reversibility were followed by using W-Vis, IR and XPS spectroscopic techniques. (C) 1999 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/08/20 alle ore 15:34:35