Effect of ageing on the dielectric relaxation of oriented and gamma irradiated LDPE

The influence of accelerated ageing on the dielectric relaxation of drawn and gamma irradiated low density polyethylene (LDPE) was studied through dielectric loss (tan δ) analysis in the temperature range from 25 to 325 K. The accelerated ageing was performed under 0.5 MPa pressure of oxygen at an e...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Polymer degradation and stability 2001-01, Vol.71 (3), p.367-373
Hauptverfasser:	Suljovrujić, Edin, Kačarević-Popović, Zorica, Kostoski, Dušan, Dojčilović, Jablan
Format:	Artikel
Sprache:	eng
Schlagworte:	Ageing Applied sciences Dielectric relaxation Exact sciences and technology Gamma irradiation LDPE Physical properties Polymer industry, paints, wood Properties and testing Technology of polymers Uniaxial orientation
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	The influence of accelerated ageing on the dielectric relaxation of drawn and gamma irradiated low density polyethylene (LDPE) was studied through dielectric loss (tan δ) analysis in the temperature range from 25 to 325 K. The accelerated ageing was performed under 0.5 MPa pressure of oxygen at an elevated temperature (80°C). The radiation induced and the post-irradiation oxidation were observed using IR spectroscopy. The intensity and the position of the γ and β dielectric relaxation maxima (tan δ max) were found to be strongly dependent upon the changes in the microstructure of the amorphous phase induced by crosslinking and oxidation.
ISSN:	0141-3910 1873-2321
DOI:	10.1016/S0141-3910(00)00187-7