Electrical properties of surfaces of unirradiated and irradiated polymers in humid environments

Author

Das-Gupta, Dilip K. ; Schmidt, Werner F.

Author_Institution

Sch. of Electron. Eng. & Comput. Syst., Univ. of Wales, Bangor, UK

Volume

18

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

266

Lastpage

269

Abstract

The behavior of surface charge decay of corona-charged polyether ether ketone (PEEK) and polypropylene (PP) for different charging potentials is reported in this work. The nature of the charge decay with PEEK shows a presence of two processes involving a fast decay which is followed by a slower process. The fast decay process may originate from a field-induced dielectric polarization while the slow process arises from a thermal hopping process. The charge decay with PP was found to be quite insignificant over an extended period of time. The adsorption of water of these two polymers with and without gamma irradiation (6 Mrad) have also been measured over a range of humidity (RH%). The adsorption was observed to be enhanced for PEEK with gamma irradiation, whereas for PP it was significantly reduced

Keywords

adsorption; corona; dielectric polarisation; gamma-ray effects; humidity; moisture; polymer films; surface charging; surface states; 6 Mrad; charging potentials; corona-charged PEEK; electrical properties; field-induced dielectric polarization; gamma irradiation; humid environments; irradiated polymer surfaces; polyether ether ketone; polypropylene; surface charge decay; thermal hopping process; unirradiated polymer surfaces; water adsorption; Corona; Current measurement; Dielectrics and electrical insulation; Humidity; Plastic insulation; Polymers; Solids; Surface charging; Surface waves; Voltage;

fLanguage

English

Journal_Title

Components, Packaging, and Manufacturing Technology, Part A, IEEE Transactions on

Publisher

ieee

ISSN

1070-9886

Type

jour

DOI

10.1109/95.390301

Filename

390301