The purpose of this paper is to study “Thermo-equivalent dose rate” on the polymer chain scission by heat and radiation.
Chemical stress relaxation of tetrafluoroethylenepropylene elastomer under the combined environment of heat and radiation was studied at various temperatures ranging from 150°C to 280°C under the dose rate of from 5.94×10
5R/hr to 2.2×10
5R/hr. Each decay curves were found to be Maxwellian.
The rate of stress decay was ploted in the forme temperature vs dose rate. The rate of decay obtained at different dose rate was found to be superposed by means of a horizontal shift along the temperature axis. And a curve which is obtained by this super position is proposed to be “Temperature-dose rate master curve.”
The relationship between the difference of dose rate and the temperature difference which is shifted to superpose referes to “Thermo-equivalent dose rate.”
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