双马来酰亚胺共聚改性及性能  

Preparation and properties of the modified bismaleimide systems

作　　者：王德志[1,2,3] 王鑫[1] 刘立柱[1] 曲春艳[2,3] 杨海冬[2] 李洪峰[2] 

机构地区：[1]哈尔滨理工大学材料科学与工程学院,哈尔滨150040 [2]黑龙江省科学院石油化学研究院,哈尔滨150040 [3]黑龙江省科学院高技术研究院,哈尔滨150020

出　　处：《复合材料学报》2017年第5期1088-1094,共7页Acta Materiae Compositae Sinica

摘　　要：采用侧甲基双马来酰亚胺(T-BMI)对4,4’-二苯甲烷型双马来酰亚胺(BDM)进行共聚改性制备一种高韧性基体树脂。研究结果表明:T-BMI-BDM改性共聚体系的力学性能得到明显的改善,当T-BMI与BDM的摩尔比为1∶1时,冲击强度和断裂韧性GIC分别达到17.2kJ/m^2和316J/m^2,比改性前分别提高了66.3%和39.8%;共聚体系的拉伸强度和弯曲强度分别达到101.0 MPa和165.0 MPa,比改性前分别提高了12.2%和2.5%;DMA和TG分析结果表明,T-BMI-BDM改性共聚体系的热性能没有明显下降,玻璃化转变温度和5%热失重温度分别达到了267.2℃和403.7℃;通过改性共混体系DSC曲线分析确定其固化工艺条件为160℃×2h+180℃×2h+200℃×2h+230℃×4h,通过改性共混体系黏度-温度和黏度-时间曲线分析确定其流变性能适用于复合材料RTM成型工艺,适宜的注射温度为125~140℃。T-typed bismaleimide （T-BMI） was used to blend with 4, 4＇-bismaleimidodiphenylmethyene （BDM） for preparing a matrix resin with high toughness. The results show that T-BMI has great effect on improving the me chanical performances of the matrix resin. With the same mole between T-BMI and BDM, the impact strength and fracture toughness （GIC value） of T BMI-BDM reach up to 17.2 kJ/m^2 and 316 J/m^2 , which are increased by 66.3% and 39.8% than before modifying, respectively. Furthermore, the tensile strength and flexural strength are up to 101.0 MPa and 165.0 MPa, they are improved by 12.2% and 2.5% than before modifying, respectively. The analysis of DMA and TG show that the heat-resistance and thermal stabilities of the copolymerization system are not significantly influenced by introduced T BML The glass transition temperature and 5% mass loss temperature are 267.2 ℃ and 403.7 ℃, respectively. Cure condition of the matrix resin determined by DSC curves are 160 ℃ × 2 h ＋180 ℃× 2 h ＋200 × 2 h＋230 ℃ ×4 h. Rheological property determined by viscosity-temperature and viscosity time curves indicates that it can be suitable for RTM process, and resin injection temperature should be selected in the range of 125 ℃to 140 ℃.

关 键 词：双马来酰亚胺 共聚体系 改性 成型工艺 流变性能 

分 类 号：TQ323.7[化学工程—合成树脂塑料工业]