催化聚合工艺对萘沥青结构和性能的影响

以精萘为原料，HF/BF3为催化剂，研究了催化聚合温度、催化聚合时间对合成萘沥青结构和性能的影响.采用红外光谱(IR)、核磁共振(NMR)、元素分析(EA)和质谱(MS)等分析方法对萘沥青分子结构进行表征.研究表明，随催化聚合温度的提高，保温时间延长，萘沥青软化点、结焦值和TI组分含量提高，芳香氢含量降低，非芳香氢尤其是Hβ含量增大；且随催化聚合温度提高，萘沥青分子中的脂肪侧链中的甲基含量降低、环烷结构含量提高.
The influence of catalytic polymerization temperature and time on structure and properties of the synthesized naphthalene pitch prepared by using naphthalene as raw material and HF/BF3 as catalyst was studied.The molecular structure of naphthalene pitch was investigated by elemental analysis (EA),infrared spectroscopy (FT〖CD*2〗IR),nuclear magnetic resonance spectroscopy (1H〖CD*2〗NMR) and mass spectrometry (MS) analyses.The results show that the softening point(SP.),coking value,toluene insoluble(TI) and aliphatic hydrogen especially Hβ content of naphthalene pitch increase but the aromatic hydrogen content reduces with the increases of catalytic polymerization temperature and the holding time. More content of naphthenic structures and lower methyl content were found in naphthalene pitch synthesized in higer catalytic polymerization temperature.