LIQUID CRYSTAL PITCH FOR PRODUCING CARBON YARN HAVING HIGH COMPRESSION STRENGTH AND PRODUCTION OF CARBON YARN HAVING HIGH COMPRESSION STRENGTH

摘要

PURPOSE: To obtain a liquid crystal pitch providing carbon yarn with high compression strength stably in high productivity and continuously, comprising a benzene-insoluble component and a benzene-soluble component, having Q value, aromatic properties, C/H ratio, optical anisotropic phase, etc., of specific values. ;CONSTITUTION: A liquid crystal pitch which comprises a benzene-insoluble component and a benzene-soluble component, having ≤1.6 Q value (weight- average molecular weight/number-average molecular weight), a ratio of number- average molecular weight of benzene-insoluble component to benzene-soluble component of ≤2.2, ≥0.8 aromatic properties (fa), ≤1.85 C/H atomic ratio and ≥90% optical anisotropic phase, provides carbon yarn having high compression strength. The pitch is subjected to melt spinning, infusibilized, then carbonized or graphitized to give carbon yarn having high compression strength.;COPYRIGHT: (C)1993,JPO&Japio