摘要
本文研究了咪唑和乙酰丙酮过渡金属络合物对氰酸酯与环氧树脂体系共固化反应行为的影响，应用DSC、FT-IR初步探索了在乙酰丙酮络合物促进作用下氰酸酯与环氧树脂体系的共固化反应机理，结果表明：加入促进剂可明显促进体系的共固化反应，降低反应温度，缩短反应时间，其反应机理：首先氰酸酯发生自聚反应形成二聚体及三嗪结构；然后二聚体可进一步反应形成三嗪，同时亦存在环氧树脂的聚醚反应；最后是三嗪环开环与剩余的环氧树脂反应形成唑烷酮结构，最终树脂固化物中含有三嗪环，唑烷酮环及聚醚结构。
The influence of 2 - ethyl - 4 - methylimidazole and a transition metal acetylacttone on the cocuring of cyanate/epoxy was studied, and the mec hanism of their co - curing in meal acetylaceone as acceleratorwas discussed. The results showed that the acceleraor can obviously accelerate the curing of the resin to decreasethe curing temperature, the mechanism of their co - curing is: cyclodimerization and cyclotrimerization of cyanate;cyclotrimerization of cyclic dimer, polyetherification of epoxy and co - reaction to oxazolidinone ring. At last, thecured resin has triazine, ring structare, polyether structare and oxazolidinone rings.
出处
《纤维复合材料》
CAS
1999年第2期3-6,16,共5页
Fiber Composites
