改性双马来酰亚胺的应用研究

Application research of modified bismaleimide

用正交实验法优化工艺条件,以二氨基二苯醚(ODA)与顺丁烯二酸酐(MA)反应合成了二苯醚双马来酰亚胺,产品收率达94.51%,纯度为99.40%。通过DSC、TG分析和拉伸性能测试比较了四种由二苯醚双马来酰亚胺,二苯甲烷双马来酰亚胺分别与二元胺,二烯丙基双酚A,环氧树脂共聚得到的产物的耐热性及力学性能。二苯醚双马来酰亚胺与二元胺及二烯丙基双酚A的共聚物的初始热失重温度,失重60%的温度,650℃时残炭率及其与环氧树脂共聚物的拉伸强度均优于二苯甲烷双马来酰亚胺体系。结果表明,二苯醚双马来酰亚胺的综合性能优于二苯甲烷双马来酰亚胺。

4,4 - diphenyl ether bismaleimide was synthesized from diamino diphenyl ether and maleic anhydride using orthogonal designed experiment to optimize the technology of synthesis. The yield achieved 94.51% and the purity was 99.40%. Four kinds of copolymers were obtained by the reaction of 4,4 - diphenyl ether bismaleimide or 4,4 - diphenyl methane bismaleimide with diamine, diallyl bisphenol A, expoxy resin. The mechanical properties and the heat resistance of the four kinds of copolymers were compared by DSC, TG analysis and tensile strength test. The initial mass loss temperature , the 60 % mass loss temperature of the copolymers of diphenyl ether bismaleimide with diamine and diallyl bisphenol A and its residual char yield at 650 ℃ were higher than that of 4,4 - diphenyl methane system. The tensile strength of of copolymers of diphenyl ether bismaleimide with expoxy resin was also higher than 4,4 - diphenyl methane. The result showed that the comprehensive properties of 4,4 - diphenyl ether bismaleimide was better than 4,4 - diphenyl methane bismaleimide.