丁胺-芴基苯并噁嗪/环氧共混树脂的性能研究

以双酚芴、正丁胺和多聚甲醛为原料,二氧六环为溶剂,通过Mannich缩合反应,合成了高纯度丁胺-芴基苯并噁嗪单体（BF-n-b）。以差式扫描量热仪（DSC）研究了苯并噁嗪单体/E-51环氧共混树脂的固化行为,通过动态热机械分析（DMA）和热重分析（TGA）研究了共混树脂的热机械和热稳定性能。结果表明,采用改进的制备方法简化了苯并噁嗪单体的合成过程,单体收率和纯度显著提高;苯并噁嗪/环氧共聚物的玻璃化转变温度（Tg）达到165~178℃,初始热分解温度（热失重5%）达312~342℃,800℃时残碳率最高达22.4%。

Study on the Performance of Butyl Amine-Fluorenyl Benzoxazine

n-Butylamine-fluorenyl benzoxazine monomer with high purity was synthesized from the reaction of 9,9-bis-（4-hydroxyphenyl）-fluorene with paraformaldehyde and n-butylamine by Mannich condensation.The curing behavior of the blends between benzoxazine monomer and E-51 epoxy resin was monitored by differential scanning calorimetry（DSC）.The thermal mechanical property and thermal stability of copolymers were evaluated by dynamic mechanical analysis（DMA） and thermogravimetric analysis（TGA）.The results showed that the synthetic process of benzoxazine was simplified by using modified method.The yield and purity of monomer obviously increased.The glass transition temperature（Tg） of copolymers reached 165~178℃.The thermal decomposition temperature（5% weight loss） and the highest carbon residue rate at 800℃ of copolymers was 312~342℃ and 22.4%,respectively.