摘要
采用两种不同环氧树脂与双酚A型二氰酸酯树脂(BADCy)进行共聚改性,应用DSC,FTIR对BADCy及其环氧改性体系的反应机理及产物结构进行了研究,结果发现,BADCy在固化过程中仅发生自聚反应并生成三嗪环。环氧改性氰酸酯体系在低温下(<180℃)主要发生氰酸酯自聚、噁唑啉酮的生成及少量环氧醚化反应,而在高温下(>200℃)主要发生噁唑啉酮结构的转变及环氧基的插入反应,并最终生成噁唑烷酮,固化体系中同时含有三嗪环、异氰尿酸酯、噁唑啉酮及噁唑烷酮环基团,各基团含量主要由改性体系中环氧基团的含量及固化温度决定。
The reaction mechanism and product structure of bisphenol A dicyanate ester （BADCy） resin and its epoxy （E51 and E20） modified systems were investigated by DSC and FTIR. The results showed that the polycyclotrimerize reaction took place in BADCy. While the main reaction in epoxies modified system at low temperature （〈180 ℃ ） were.. Cyclotrimerization of cyanates, polyetherfication of epoxy groups and cyclotrimerization of cyclic dimmers and the formation of oxazoline ring. At high temperature （〉200℃）, the formation of oxazolidinone ring were dominant. The contents of cyclotrimerization, polyetherfication, oxazoline ring and oxazolidinone ring were mainly dependent on the content of epoxy group in the modified systems and the curing temperature.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2008年第4期27-32,37,共7页
Journal of Materials Engineering
基金
国家自然科学基金资助项目(50273029)
关键词
氰酸酯树脂
环氧树脂
共聚反应
反应机理
cyanate ester
epoxy resin
copolymerization
mechanism reaction
