Electric poling behavior of polymethylmethacrylate

Author

Bernstein, J.B. ; Cooke, C.M.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., MIT, Cambridge, MA, USA

Volume

26

Issue

6

fYear

1991

fDate

12/1/1991 12:00:00 AM

Firstpage

1087

Lastpage

1093

Abstract

The electrically stimulated acoustic wave method for observing resident space charge in dielectric insulators has been used to characterize the poling behavior of millimeter-thickness samples of polymethylmethacrylate (PMMA) at temperatures from 40 to 90°C with moderate applied fields. Heterocharge appears in the bulk of every sample tested, resulting in an apparent net increase of low frequency dielectric permittivity over time. In addition, a net internal charge was observed in some cases. This net charge was negative and located in the vicinity of the poling anode, and became most significant at 90°C

Keywords

electric breakdown of solids; organic insulating materials; permittivity; polymers; space charge; 40 to 90 degC; dielectric insulators; electrically stimulated acoustic wave method; heterocharge; low frequency dielectric permittivity; net internal charge; poling behavior; polymethylmethacrylate; resident space charge; Acoustic waves; Charge carrier processes; Dielectrics and electrical insulation; Laser modes; Monitoring; Optical pulses; Plastic insulation; Polymers; Space charge; Thermal stresses;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.108145

Filename

108145