The face pitch null meso carbon material

摘要

PURPOSE:To obtain the subject pitch, available from a condensed polycyclic hydrocarbon or a substance containing the hydrocarbon, containing a large amount of an optically anisotropic phase, excellent in spinning properties and capable of providing high-strength and high-elastic modulus carbon fibers of stable quality. CONSTITUTION:The objective pitch, obtained by polymerizing a condensed polycyclic hydrocarbon or a substance containing the hydrocarbon preferably in the presence of hydrogen fluoride or boron trifluoride at 0.5-1.0 ratio of H/C and containing =7% naphthenic carbon in the total carbon and =90% optically anisotropic phase. Furthermore, naphthalene, anthracene, phenanthrene, pyrene, etc., are exemplified as the condensed polycyclic hydrocarbon.