高性能双马树脂底胶的性能

Characteristics of Primer of High Performance Bismaleimide Resin

采用嵌段共聚物增韧双马来酰亚胺(BMI)树脂体系,制备双马来酰亚胺树脂底胶(双马底胶),该底胶的黏附性、铅笔硬度、抗冲击、耐环境、耐老化性能等技术指标满足GJB1388规范要求。采用DSC,TG,DMA测试对双马底胶性能热性能进行表征。结果表明:该底胶具有良好的耐热性,200℃固化后玻璃化转变温度为238℃,5%热失重温度为384℃,230℃热处理后玻璃化转变温度高达268℃,5%热失重温度为407℃。双马底胶和双马胶膜配合使用后粘接强度提高,当与J-188双马胶膜配合使用时,剥离强度提高到107%,常温和高温剪切强度可提高10%。该底胶也可与其他双马结构胶膜配合使用,适用于金属之间或双马复合材料与金属之间的粘接。

A primer of the bismaleimide resin toughened with block copolymer was prepared.The properties of the primer,such as adhesion,pencil hardness,impact resistance,environment resistant,ageing resistant performance and etc. meet the requirements of the technical specifications of GJB1388.The thermal property of the primer was characterized by differential scanning calorimeter(DSC),thermal gravity analysis(TG),and dynamic mechanical analysis(DMA).The results show that the primer possesses good heat resistance,the glass transition temperature of the primer reach238℃,5% mass heat lost temperature is 384℃ after 200℃ cured,and the glass transition temperature of the primer reach 268℃,5% mass heat lost temperature is 407℃after 230℃ heat treatment respectively.Bonding strength will increase when the bismaleimide primer doubled with bismaleimide film adhesive,when the primer doubled with J-188 bismaleimide film adhesive,peel strength increases to 107%,the room temperature shear strength and high temperature shear strength increase by 10%.The primer can also be used with other bismaleimide film structural adhesives,which are suitable for the bonding between metals or bismaleimide composites with metals.