伯胺的碱性对苯并恶嗪合成的影响  

Influence of primary amine basicity on the synthesis of 3,4-dihydro-2H-3-substituted-1,3-benzoxazine

作　　者：张勤[1] 杨坡[1] 朱蓉琪[1] 顾宜[1] 

机构地区：[1]四川大学高分子科学与工程学院高分子材料工程国家重点实验室,四川成都610065

出　　处：《热固性树脂》2015年第4期19-23,共5页Thermosetting Resin

基　　金：国家自然科学基金项目(21174093)资助

摘　　要：以苯酚、甲醛水溶液、碱性不同的伯胺(苯胺、苄胺、正丙胺、环己胺)为原料70℃下合成了3,4-二氢-2H-3-取代基-1,3-苯并恶嗪。通过气相色谱法在线取样,追踪原料苯酚和产物苯并恶嗪浓度的变化,研究了伯胺的碱性对苯并恶嗪合成的影响,并由动力学拟合计算得到了各体系的反应速率常数。结果表明,苯并恶嗪的生成量与苯酚的消耗量呈对应关系。苯并恶嗪的生成速率随伯胺的碱性增强而加快。The 3,4-dihydro-2H-3-substituted-1,3-benzoxazine(benzoxazine)was synthesized from primary amine(including aniline,benzylamine,n-propylamine,cyclohexylamine),phenol and formalin at 70 ℃. The effect of primary amine basicity on the synthesis of benzoxazine was investigated by tracking the concentrations of starting materials(phenols)and products(benzoxazines)with gas chromatography(GC). The reaction rate constants of each system were fitted and calculated by the dynamics. The results showed that benzoxazine generation amount and the phenol consumption was correspondence. The generation rate of benzoxazine was accelerated with the strengthening of primary amine basicity.

关 键 词：苯并恶嗪 伯胺 碱性 反应速率常数 

分 类 号：TQ323.1[化学工程—合成树脂塑料工业]