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为了研究六次甲基四胺对芘热缩聚的影响,分别以芘或芘与六次甲基四胺的混合物为原料在480℃进行热缩聚反应,并利用MALDI-TOF-MS、13C-NMR、FT-IR、元素分析和热台显微镜对热缩聚产物的组分、结构进行分析表征。测试结果表明,添加六次甲基四胺后,芘单体能够完全转化为低聚体,热缩聚产物中的碳元素含量和氯仿不溶物含量升高。此外,元素分析结果显示六次甲基四胺在芘热缩聚过程中(400℃)能够与芘相结合,随着反应温度的提高(480℃),大部分六次甲基四胺从反应体系中排出。这些研究结果说明六次甲基四胺对于芘的热缩聚反应具有明显的催化作用。
In order to study the effect of hexamethylenetetramine on the thermal polycondensation of pyrene, the thermal polycondensation reaction was carried out at 480 ℃ with the mixture of pyrene or pyrene and hexamethylenetetramine as raw materials respectively, and the structure was characterized by MALDI-TOF-MS and 13C-NMR , FT-IR, elemental analysis and hot-stage microscopy were used to characterize the composition and structure of the thermal condensation products. The test results show that the addition of hexamethylenetetramine, pyrene monomer can be completely converted to oligomers, carbon content in the thermal polycondensation products and chloroform insoluble content increased. In addition, the results of elemental analysis showed that hexamethylenetetramine could be combined with pyrene during the thermal polycondensation of pyrene (400 ℃). With the increase of reaction temperature (480 ℃), most of the hexamethylenetetramine was removed from the reaction system In the discharge. These results indicate that hexamethylenetetramine has a significant catalytic effect on thermal polycondensation of pyrene.