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Novel diagnosis of thermal deterioration for organic insulating resins by optical loss analysis
Author(s) -
Takezawa Yoshitaka,
Akasaka ShinIchi,
Koyama Tohru,
Miya Hisaichi,
Shimodera Makoto
Publication year - 1995
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760351708
Subject(s) - materials science , composite material , glass transition , thermal analysis , alkyd , thermal , dynamic mechanical analysis , optical path , polymer , optics , thermodynamics , coating , physics
We propose an “optical loss analysis” as a novel nondestructive diagnosis for the thermal deterioration of insulating resins. Using an alkyd resin film, the optical absorptin loss per unit optical path length and the glass transition temperature ( T g , DMA ) by dynamic mechanical analysis were measured during heating tests. At longer heating times, values of the optical absorption loss and the T g , DMA increased concurrently. By rescaling the heating time as a reduced time as a reduced time, a master curve of the deterioration for the resin was obtained. Consequently, when thermal stress is the main cause of the deterioration, one can estimate the degree of deterioration and theoretically the residual lives of resins using this optical loss analysis.