以4-羟基偶氮吡啶、多聚甲醛和糠胺为原料,采用溶剂法合成了偶氮吡啶苯并口恶嗪单体。通过红外光谱仪和紫外分光光度计对单体结构和光活性进行表征测试。采用原位红外光谱仪和非等温示差扫描量热仪分析单体的固化行为。结果表明,单体中的偶氮基团存在顺反异构化现象,单体固化起始温度、恒温固化温度和后处理温度分别为175℃、185℃和217℃。
Using 4-hydroxyazopyridine,paraformaldehyde and furfuramine as raw materials,azopyridine benzoxazine monomer was synthesized by solvent method.The structure and photoactivity of the monomers were characterized and tested by infrared (FT-IR) and ultraviolet spectrophotometer (UV).In-situ infrared (Insitu-FT-IR) and non-isothermal differential scanning calorimeter (DSC) were used to analyze the curing behavior of the monomers.The results shown that there was cis-trans isomerization of the azo group in the monomer.The initial curing temperature (Ti0),the constant temperature curing temperature(Tp0) and the post-treatment temperature(Tf0) of the monomer were 175℃,185℃ and 217℃,respectively.
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