Influence of morphology on electrical breakdown strength for polypropylene

Author

Kawahigashi, M. ; Miyashita, Y. ; Kato, H.

Author_Institution

Mitsubishi Cable Industries Ltd., Hyogo, Japan

fYear

1991

fDate

8-12 Jul 1991

Firstpage

1156

Abstract

To elucidate the mechanism of electrical breakdown for an insulating polymer, the authors investigated the correlation of impulse breakdown behavior and morphological structure for polyolefins. Since polypropylene (PP) has a morphology which can easily be observed under a microscope with polarized light, the behavior of this polymer was studied. The morphological structure of PP was controlled by the following methods: (1) incorporation of a variety of additives or polymers having different molecular weights, (2) addition of a nucleating agent, and (3) control of crystallizing temperature and period. As a result of a series of experiments, it was confirmed that the impulse breakdown property of PP was closely related to its morphology, and these methods were effective in improving the impulse breakdown property of polyolefins by changing the morphology

Keywords

electric breakdown of solids; electric strength; organic insulating materials; polymers; additives; crystallizing temperature; electrical breakdown strength; impulse breakdown behavior; insulating polymer; morphological structure; nucleating agent; polyolefins; polypropylene; Additives; Crystallization; Dielectrics and electrical insulation; Electric breakdown; Microscopy; Morphology; Optical polarization; Plastic insulation; Polymers; Temperature control;

fLanguage

English

Publisher

ieee

Conference_Titel

Properties and Applications of Dielectric Materials, 1991., Proceedings of the 3rd International Conference on

Conference_Location

Tokyo

Print_ISBN

0-87942-568-7

Type

conf

DOI

10.1109/ICPADM.1991.172282

Filename

172282