Research on the Formation of Volatile Components During the Polymerization Process of Coal Liquefied Pitch and Its Influence on the Properties of Mesophase Pitch
Low-cost and high-performance carbon materials can be prepared by using cheap coal-liq-uefied pitch.The formation of volatile components in the reaction process has a significant impact on the softening point of mesophase pitch,mesophase morphology,spinnability and the properties of final car-bon materials.It is of great significance to study the formation and control of volatile components and its influence mechanism on the characteristics of mesophase pitch.The mesophase pitch was synthesized through three different polymerization processes.By investigating the influence of different polymeriza-tion conditions on the volatile components and the properties of mesophase pitch,it was found that when the content of volatile components was too high,the softening point of mesophase pitch was une-ven and the spinnability was poor.If the content of volatile components was too low,the softening point of mesophase asphalt was high,the processing property was poor,and the reaction yield was low.The results show that volatile components can fully participate in polymerization reaction,to obtain me-sophase pitch with high reaction yield,low softening point,uniform distribution of mesophase morphol-ogy,and good spinnability by adopting the segmented process of atmospheric blowing and pressurized polymerization.
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