STUDY OF REACTIVITY BETWEEN DIFFERENT COAL TAR PITCHES AND PYRIDINE BORANE

Boron substituted mesophase pitches were synthesized by co pyrolysis of different coal tar pitches with pyridine borane complex.The softing points, coke yields, solubility in tetrahydrofurane (THF) and polarized micrographs were compared. It is found that the results are different. The coal tar pitch with high soffening point after purification had higher reactivity with pyridine borane, which was proved by the soffening point, coke yield solubitily in THF and polarized microstructure of obtained pitch.