High-field conductivity of non-oriented hazy polypropylene films

Author

Weifang, Jin ; Minsheng, Wang ; Ziyu, Liu

Author_Institution

Dept. of Electr. Eng., Xian Jiaotong Univ., China

Volume

25

Issue

6

fYear

1990

fDate

12/1/1990 12:00:00 AM

Firstpage

1092

Lastpage

1096

Abstract

The conduction of nonoriented, hazy polypropylene films has been investigated between 8 and 123°C at electrical stresses of up to 2×10⁶ V/cm DC using a ramping speed of 200 V/s. The film thickness ranged from 70 to 80 μm. The recorded current traces indicate some unusual behavior in the vicinity of 113°C. Infrared absorption spectra suggest an increase in crystallinity, and high-resolution differential scanning calorimetry suggests a departure from linear behavior at this temperature. An attempt is made to explain this behavior in terms of structural changes that lead to the development of a negative resistance

Keywords

calorimetry; electronic conduction in insulating thin films; high field effects; infrared spectra of organic molecules and substances; polymer films; 70 to 80 micron; 8 to 123 degC; IR absorption spectra; crystallinity; current traces; electrical stresses; film thickness; hazy polypropylene films; high-resolution differential scanning calorimetry; linear behavior; negative resistance; ramping speed; Circuit testing; Conductive films; Conductivity; Electrodes; Laminates; Oil insulation; Polymer films; Power cables; Resistors; Stress;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.64494

Filename

64494