改性煤沥青热转化中间相结构性质与表征  

Structural Properties and Characterization of Mesophase in Thermal Conversion of Modified Coal Tar Pitch

作　　者：张钰琪 韩冬云[1] 乔海燕 石薇薇[1] 曹祖宾[1] ZHANG Yuqi;HAN Dongyun;QIAO Haiyan;SHI Weiwei;CAO Zubin(College of Petroleum and Chemical Engineering,Liaoning Petrochemical University,Fushun Liaoning 113000,China)

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113000

出　　处：《当代化工》2024年第3期597-601,共5页Contemporary Chemical Industry

基　　金：辽宁省教育厅2021年度科学研究项目(项目编号:LJKZ0409)。

摘　　要：采用实验室自制石英管式炉,以中温煤焦油沥青(CTP01)、改性沥青(CTP02)进行热缩聚反应。通过红外光谱(FT-IR)、拉曼(Raman)、X射线衍射法(XRD)、热重(TG/DTG)以及偏光显微镜对CTP01和CTP02在热转化过程中生成的中间相沥青进行了表征分析。结果表明:在反应温度430℃、恒温时间7 h制得中间相沥青,CTP02内部具有排列规整、取向性更好的芳香片层分子,热聚合后明显相对分子质量变大,芳环上的取代基明显增强,稠环芳烃含量增加;CTP01制得中间相沥青光学各向异性含量较低,很难形成稳定的区域型结构,主要以中小区域镶嵌型为主,而CTP02制得中间相沥青光学各向异性含量较高,易形成广域型结构。A quartz tube furnace made in the laboratory was used to conduct thermal condensation reaction with medium temperature coal tar pitch(CTPO1)and modified pitch(CTP02).The mesophase pitch formed during the thermal conversion of CTPO1 and CTP02 was characterized and analyzed by FT-IR,Raman,XRD,TG/DTG and polarizing microscope.The results showed that the mesophase pitch was prepared at reaction temperature of 430℃ and constant temperature of 6 h,and there were aromatic lamellar molecules in CTP02 with regular arrangement and better orientation.After thermal polymerization,the relative molecular weight of CTP02 increased significantly,the substituents on the aromatic ring increased significantly,and the content of polycyclic aromatic hydrocarbons increased;The content of optical anisotropy of mesophase asphalt prepared by CTPO1 was low,and it was difficult to form a stable regional structure,mainly small and medium-sized regional mosaic,while the content of optical anisotropy of mesophase asphalt prepared by CTP02 was high,and it was easy to form a wide-area structure.

关 键 词：中间相沥青 热缩聚 微观结构 

分 类 号：TQ522.65[化学工程—煤化学工程]