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以煤沥青为原料、三聚甲醛为交联剂、对甲苯磺酸为催化剂.在一定反应条件下合成缩合多环多核芳香烃(COPNA)树脂。采用FT-IR和H-NMR等分析方法研究其反应机理;采用TG分析方法研究COPNA树脂的热行为。研究表明.煤沥青在酸性催化剂条件下能与交联剂三聚甲醛合成COPNA树脂.其反应机理为酸催化作用下的阳离子型缩聚反应;相对于原料煤沥青,COPNA树脂具有较高的耐热性、炭收率和β树脂含量。
Using coal tar pitch as raw material, trioxane as crosslinking agent and p-toluenesulfonic acid as catalyst, the condensed polycyclic polynuclear aromatic hydrocarbons (COPNA) were synthesized under certain reaction conditions. The reaction mechanism was studied by FT-IR and H-NMR. The thermal behavior of COPNA resin was investigated by TG method. The results show that coal tar pitch can react with trimellitic acid as crosslinker in the acidic catalyst to produce COPNA resin.The reaction mechanism is the cationic polycondensation reaction under acid catalysis. Compared with coal tar pitch, COPNA resin has higher heat resistance Properties, carbon yield and β resin content.