Investigation of the degradation of pitch-based carbon fibers properties upon insufficient or excess thermal treatment.

ABSTRACT: To overcome the disadvantages of discontinuous conventional batch extruders, a continuous screw extruder is introduced to manufacture pitch-based carbon fibers. For a carbon fiber preparation process, an oxidation time of 8 h was determined to be optimal for obtaining desirable mechanical properties of the fibers acquiring employing the screw extruder. It is hypothesized that the differences in the properties of the carbon fibers fabricated utilizing the batch and screw extruders originate from the melt spinning time; therefore, a combined equation for the total amount of heat treatment from the pitch precursor through the oxidation process is established in this study. The crystallinity of the carbon fibers is confirmed to correspond to the differences in mechanical properties as the oxid

SUBMITTER: Lim TH 

PROVIDER: S-EPMC5498616 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature