摘要
为了提高苯并恶嗪的耐高温性能,合成了含醛基的苯并恶嗪中间体。采用溶剂两步法合成含醛基的苯并恶嗪中间体,利用红外光谱和核磁氢谱对其结构进行表征,同时利用DSC对其固化反应过程进行了研究,通过TGA对其耐热性能进行测试。结果表明含醛基的苯并恶嗪中间体在氮气保护下,800℃的残碳率高达65.63%,与普通的苯并恶嗪树脂相比,残碳率提高了20%,耐热指数为221.09℃。综上可知,醛基的引入可以有效地提高苯并恶嗪树脂的耐热性能和热稳定性能。
To improve the high temperature resistance of benzoxazine,aldehyde-functionalized benzoxazine was synthesized.Aldehyde-functionalized benzoxazine was prepared via solvent and two-step method and its molecular structure was confirmed by FTIR and 1HNMR.Cure behavior of aldehyde functionalized benzoxazine was investigated by DSC.At last,measuring by TGA indicated that aldehyde functionalized benzoxazine achieved a char yield as high as 65.63% at 800℃ under nitrogen environment which is 20% higher than that of ...
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2008年第3期45-48,共4页
Aerospace Materials & Technology
