Electrical studies on PVA-PE copolymer

✍ Scribed by A. S. Ibrahim; G. Attia; M. S. Abo-Ellil; F. H. Abd El-Kader

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 140 KB
• Volume: 63
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19970118)63:3<343::aid-app9>3.0.co;2-n

✦ Synopsis

The electrical transport properties including electrical conductivity ( s), dielectrical constant (e), thermally stimulated depolarization current (TSDC), and pyroelectric coefficient ( P) of a poly(vinyl alcohol)-polyethylene (PVA-PE) copolymer were studied in the temperature range 296-433K. Two stages of behavior have been observed with activation energies 1.49 and 0.05 eV. Discussion of conduction mechanism was carried out in terms of relevant theories. The existence of a relaxation peak in e versus T relation has been analyzed taking into consideration space charge effects and dipole orientation phenomena. The TSDC spectra showed two peaks with differing intensity and position independent of field intensity. Pyroelectric current data provide further support to space charge effects.