Charge trapping and conduction in γ irradiated isotactic polypropylene

The present work aims at investigating the relationship between the structural change and the electrical properties of isotactic polypropylene irradiated by gamma-rays at doses up to 100 kGy. Physicochemical analyses revealed a substantial increase of the carbonyl index of the material after irradia...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2017-12, Vol.24 (6), p.3821-3830
Main Authors: Mouaci, S., Teyssedre, G., Belkahla, N., Saidi, M., Griseri, V., Saidi-Amroun, N.
Format: Article
Language:English
Subjects:
Atmospheric measurements
Carbonyls
Conductivity
Crosslinking
Current measurement
deep trap
Dielectric properties
Electrical properties
Electrical resistivity
Engineering Sciences
gamma radiation
Irradiation
Isotacticity
Oxidation
Polymers
Polypropylene
Radiation effects
space charge
Temperature measurement
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The present work aims at investigating the relationship between the structural change and the electrical properties of isotactic polypropylene irradiated by gamma-rays at doses up to 100 kGy. Physicochemical analyses revealed a substantial increase of the carbonyl index of the material after irradiation along with a considerable increase of crystallinity which can be attributed to the cross-linking phenomenon. Dielectric properties of the materials were probed by charging/discharging currents and thermally stimulated currents. A significant increase in the conductivity was observed in comparison to the virgin sample. The thermally stimulated discharge current exhibits two peaks, whereas no peak was detected in virgin sample. These features appear related to the detrapping of space charges from deep traps created upon irradiation.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2017.006636