Preparation of isotropic pitch precursors for general purpose carbon fibers (GPCF) by air blowing—II. Air blowing of coal tar, hydrogenated coal tar, and petroleum pitches

Preparation of isotropic pitch precursor

Preparation of isotropic pitch precursors for general purpose carbon fibers (GPCF) by air blowing—I. Preparation of spinnable isotropic pitch precursor from coal tar by air blowing

✍ Toyohiro Maeda; Shu Ming Zeng; Katsuhisa Tokumitsu; Juji mondori; Isao Mochida 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 733 KB

A QI-free coal tar pitch with a softening point around 80°C was air blown in an autoclave at 330", 360", and 38O"C, respectively, for various periods in order to prepare a pitch precursor for GPCF. Air blowing markedly increased the softening point and contents of solvent insoluble fractions such as