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Preparation of isotropic pitch precursors for general purpose carbon fibers (GPCF) by air blowing—III. Air blowing of isotropic naphthalene and hydrogenated coal tar pitches with addition of 1,8-dinitronaphthalene

✍ Scribed by Shu Ming Zeng; Toyohiro Maeda; Juji Mondori; Katsuhisa Tokumitsu; Isao Mochida

Book ID: 107727589
Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 720 KB
Volume: 31
Category: Article
ISSN: 0008-6223
DOI: 10.1016/0008-6223(93)90129-x

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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