Formation of anisotropic mesophase from various carbonaceous materials in early stages of carbonization

摘要: The low-temperature carbonization of pitches, reduced crudes, synthetic polymers, and various ranks coals has been studied by polarized-light microscopy, x-ray diffraction, solvent extraction. Formation anisotropic mesophase is a function heat-treatment temperature residence time for those materials that pass through fusion stage in the range from 350 to 500 deg C. nucleation spherules pitches crude during proportional amount BETA - resin, which benzene-insoluble quinoline-soluble, rate its formation. Addition sulfur pitch turns texture fine mosaic when mixtures are heat treated Methylation hydroxyl groups 3,5- dimethyl phenol formaldehyde reacting with sulphate, gives an consists actually tiny together parent matrix; original resin typical texture. molecular forces decomposing carbonaceous among important factors governing transformation. A common mechanism formation textures can explain behavior coalcokes, pitch, polymers.more » (auth)« less