新型含炔基苯并(口恶)嗪的合成及性能研究

Synthesis and characterization of a novel alkynyl-containing benzoxazine

为了提高苯并(口恶)嗪的热稳定性,以对碘苯胺、3-氨基苯乙炔、苯酚及多聚甲醛为原料合成了新型的含炔基苯并(口恶)嗪(PA-an-ba),并通过傅里叶变换红外光谱仪和核磁共振仪(1 H-NMR,13 C-NMR)对其结构进行表征,通过差示扫描量热仪和热重分析仪对其固化行为和热性能进行了测试。结果表明:炔基的引入能显著提高聚苯并(口恶)嗪的耐热性,其失重率为5%和10%时的温度分别为437℃和464℃,800℃的残炭率为73%,比传统苯并(口恶)嗪提高了40%。

In order to improve the thermal stability of benzoxazine,alkynyl-containing benzoxazine was synthesized from p-Iodoaniline,3-Aminophenylacetylene,phenol,paraformaldehyde and characterized by fourier transform infrared spectroscopy(FT-IR)and nuclear magnetic resonance(1 H-NMR,13 C-NMR).The cure behavior and thermal stability of the benzoxazine with alkynyl groups were tested by differential scanning calorimeter(DSC)and thermogravimetric analysis(TGA).The results showed that the thermal stability was improved significantly with the introducing alkynyl groups.The 5% and 10% decomposition temperatures were 437℃ and 464℃ respectively,and the char yield at 800℃ was as high as 73% under nitrogen environment which was 40% higher than traditional benzoxazine.