Abstract
In order to shorten the processing time for oxidative stabilization in pitch based carbon fiber, petroleum derived mesophase pitch fiber was oxidized in air containing 2% of NO2. Oxygen consumption by pitch fiber were determined under several conditions by measuring O2 concentration of exit gas from the reactor. The change of elemental composition ofoxidized pitch fiber was elucidated with elemental analysis. Large shortening of required time for complete stabilization by NO2 addition was quantitatively demonstrated. The elementalanalysis of oxidized fiber indicated that the higher rate of oxygen fixation in the fiber is considered to responsible for shortening the required time for complete stabilization.
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