Some considerations on the oxidation of low density polyethylene thermally aged at the temperature under and above the melting point using electric characteristics

Author

Koo, Ja-Yoon ; Kim, Jeong-Tae ; Lee, Jeong-Heon

Author_Institution

Dept. of Electr. Eng., Han Yang Univ., Seoul, South Korea

fYear

1991

fDate

8-12 Jul 1991

Firstpage

1011

Abstract

Electrical properties have been measured using TSC (thermally stimulated current) and tan δ in order to understand the oxidation of thermally stressed LDPE (low-density polyethylene) specimens which have been aged at temperatures below 100°C and above 130°C, the melting point. The authors have observed different aspects in the peaks of the TSC characteristics and of the tan δ measurements, depending on the aging temperature. The oxidation of thermally aged LDPE specimens seems to be related deeply to the aging temperature: below the melting point the amorphous regions are preferably oxidized, but above the melting point the crystalline regions as well as the amorphous regions are likely to be oxidized

Keywords

ageing; dielectric losses; organic insulating materials; oxidation; polymers; thermally stimulated currents; -50 to 90 degC; 100 degC; 130 degC; TSC; aging temperature; amorphous regions; crystalline regions; loss tangent; low density polyethylene; melting point; oxidation; preferential oxidation; thermal aging; thermally stimulated current; thermally stressed LDPE; Aging; Amorphous materials; Crystallization; Current measurement; Electric variables measurement; Oxidation; Polyethylene; Stress measurement; Temperature dependence; Thermal stresses;

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.1991.172244

Filename

172244