新型含硼苯并噁嗪的合成及其与环氧树脂共混热性能

以乙醇胺、硼酸为原料合成硼酸乙醇胺酯（BAE），再用所得硼酸乙醇胺酯与多聚甲醛、苯酚反应，合成含硼苯并噁嗪（BAE-BOZ）。将所得BAE-BOZ高温固化，BAE-BOZ和环氧树脂E-51按照不同的质量比进行熔融共混，并经高温固化。采用FT-IR，¹H NMR 和¹³C NMR等分析了BAE-BOZ的化学结构，证明了产物为目标产物；采用DSC对BAE-BOZ的固化特性进行研究；采用TG 分析了含硼乙醇胺型苯并噁嗪poly（BAE-BOZ）和BAE-BOZ/E-51共聚物的热稳定性。结果表明：BAE-BOZ在218℃出现了固化峰；BAE-BOZ的硼含量达到8.67%，在N₂条件下，poly（BAE-BOZ）的热分解温度为302℃，在426℃时热分解速率最快，800℃的残炭率为58.08%，与未经硼改性的乙醇胺型苯并噁嗪（E-BOZ）相比，热分解温度提高40℃，残炭率提高了16.28%；BAE-BOZ/E-51共聚物的热分解温度达到343℃，热性能得到进一步提高。

Synthesis of novel boron containing benzoxazine and its thermal properties with epoxy resin blends

The boric acid ethanolamine ester (BAE) was synthesized using boric acid and ethanolamine. The synthesis of benzoxazine contained boron (BAE-BOZ) was synthesized by using BAE, phenol and paraformaldehyde. The BAE-BOZ are mixed with epoxy resin in different proportions, and then cured by high temperature. Using FT-IR, ¹H NMR and ¹³C NMR analysis of the chemical structure of BAE-BOZ, proved that the target product has been synthesized. Curing properties on BAE-BOZ was studied with DSC, the thermal stability of poly(BAE-BOZ) cured BAE-BOZ/E-51 were studied by using TG analysis. The results showed that the curing peak of BOZ appeared at 218℃, B and oxazine ring were combined by B O C, and the highest the boric content in BAE-BOZ was 8.67%, the initial pyrolysis temperature was about 302℃, and the carbon residual at 800℃ increased from 41.80% to 58.08%. The thermal decomposition temperature of BAE-BOZ/E-51 copolymer reached 343℃.