Enhanced Stabilization Reactivity of Coal Tar Based Mesophase Pitch Fiber by Blending PVC Pitch

Abstract

Abstract PVC pitch prepared at 420 °C for 2 h was blended into a coal tar based mesophase pitch to enhance the stabilization reactivity of the whole pitch fibers. No deterioration of spinnability was recognized after the blending, suggesting their high compatibility. The oxidative stabilization in the air at 270 °C took 120 min for the stabilization of the parent mesophase pitch fibers to maintain its fiber form during the carbonization up to 600 °C, while the pitch fibers from the blends with PVC pitch in 5 or 10 wt% took 80 min to be stabilized. Blended PVC pitch is supposed to be oxidized more easily to react with coal tar derived molecules, enhancing the stabilization reactivity of the whole fiber.