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以双酚A、苯胺、多聚甲醛为原料,合成了双酚A-双苯并嗪(DBOZ),再用其与DOPO(9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物)反应,合成了含DOPO的双酚A-单苯并嗪(DBDO)。采用红外、核磁共振(氢谱核磁共振和碳谱核磁共振)等分析手段对DBOZ和DBDO的化学结构进行了表征;采用差示扫描量热仪对DBOZ和DBDO的固化特性进行研究,使用热重分析分析了所得聚苯并嗪的热稳定性。结果表明:在N2气氛中,DBOZ在205℃左右开环聚合,热分解温度为312℃,在373℃分解速度达到最快,在800℃时的残碳率为37.19%;在N2气氛中,DBDO的热分解温度为353℃,在443℃分解速度达到最快,在800℃时的残碳率为39.60%。
Bisphenol A, aniline and paraformaldehyde were used as raw materials to synthesize bisphenol A-bisbenzoxazine (DBOZ) and then reacted with DOPO (9,10-dihydro-9- -10-oxide) to synthesize bisphenol A mono-benzoxazine (DBDO) containing DOPO. The chemical structures of DBOZ and DBDO were characterized by means of infrared and nuclear magnetic resonance (1H NMR and GC NMR). The curing characteristics of DBOZ and DBDO were studied by differential scanning calorimetry (DSC) The thermal stability of the obtained polybenzoxazine was analyzed and analyzed. The results showed that in N2 atmosphere, DBOZ was ring-opened and polymerized at 205 ℃, the thermal decomposition temperature was 312 ℃, the decomposition rate reached the fastest at 373 ℃, and the residual carbon rate was 37.19% at 800 ℃. In N2 atmosphere, The thermal decomposition temperature of DBDO was 353 ℃, the decomposition rate reached the fastest at 443 ℃, and the residual carbon rate was 39.60% at 800 ℃.