DocumentCode :
1072791
Title :
Effect of Heat Treatment on Dielectric Strength of Polyethylene Terephthalate under Compressive Stress
Author :
Park, C.H. ; Okajima, K. ; Hara, M. ; Akazaki, M.
Author_Institution :
Department of Energy Conversion Engineering Kyushu University, Kasuga, Japan
Issue :
4
fYear :
1983
Firstpage :
380
Lastpage :
389
Abstract :
Measurements of dc dielectric strength of polyethylene terephthalate (PET) film at room temperature are reported when it is heat set in silicone oil over a range of temperature between 60 to 200°C for durations of 1 and 60 min in order to control the degree of crystallinity of the sample. It is found that the dc dielectric strength under no mechanical stress increases with an increase in the degree of crystallinity, but the maximum dielectric strength under compressive stress at first increases with the degree of crystallinity, then reaches a maximum value, and decreases thereafter. For the samples heat treated near the glass transition temperature, which is about 70°C, the characteristics of dielectric strength under compressive stress are also varied significantly with heat-treated temperature and time although the crystallinity is constant.
Keywords :
Compressive stress; Crystallization; Dielectric breakdown; Dielectric measurements; Heat treatment; Plastic films; Polyethylene; Positron emission tomography; Semiconductor films; Temperature distribution;
fLanguage :
English
Journal_Title :
Electrical Insulation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9367
Type :
jour
DOI :
10.1109/TEI.1983.298676
Filename :
4081121
Link To Document :
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