STUDIES ON RHEOLOGICAL PROPERTIES AND CARBONIZATION OF COAL TAR PITCH

The rheological properties and carbonization of coal tar pitch were investigated.The results show that the factors effecting rheological properties of pitehcoal tar pitch differ in various ranges of temperature.The solvation of BI and QI components of pitch is primary factor which influences viscosity of pitch from 200℃ to 320℃. Solvation and mesophase formation effect on viscosity from 320℃ to 400℃.MeSophase formation is main effective factor from 400℃ to 450℃.The carbonized products of pitch were investigated by X—ray diffraction and ESR.