中温固化韧性耐热双马来酰亚胺树脂的制备与性能  

Preparation and Properties of a Moderate-Temperature Curable Bismaleimide Resin Exhibiting Good Toughness and Heat-Resistance

作　　者：周如金 王翔[1] 王钧[1] ZHOU Rujin;WANG Xiang;WANG Jun(School of Materials Science and Engineering,Wuhan University of Technology / Institute of Advanced Materials and Manufacturing Technology,Wuhan 430070,Hubei,China)

机构地区：[1]武汉理工大学材料科学与工程学院/先进材料制造装备与技术研究院

出　　处：《武汉大学学报（理学版）》2018年第4期337-342,共6页Journal of Wuhan University:Natural Science Edition

基　　金：中央高校基本科研业务费专项资金资助(2018Ⅲ073GX)

摘　　要：双马来酰亚胺（BMI）树脂存在着树脂溶解性差、固化成型温度高以及固化物脆性大等缺点.采用二烯丙基双酚A（DABPA）和3-乙炔基苯胺（m-APA）为扩链增韧剂,以叔丁基过氧化氢（TBHP）为催化剂,与N,N′-（4,4′-二苯甲烷）双马来酰亚胺（BDM）共聚,获得了一种可中温固化的改性BMI树脂.研究结果表明：该改性BMI树脂预聚体在95~140℃温度下仍具有良好的流动性,适合用于浸渍增强材料;其固化成型温度较未添加TBHP的工艺降低了50~60℃;BMI树脂固化物的两个玻璃化转变温度分别高达296.4℃和334.8℃,质量损失5%时的温度为411.4℃,弯曲强度和冲击强度分别为122.6 MPa和11.8kJ·m^-2,具有良好的耐热性能和韧性.The pure bismaleimide（BMI）resin has the shortcomings of brittleness,poor solubility,high curing processing temperature.2,2′-diallylbisphenol A（DABPA）and 3-aminophenylacetylene（m-APA）as chain extender,and tert-butyl hydroperoxide（TBHP）as catalyst were adopted to copolymerize with N,N′-（4,4′-diphenylmethane）bismaleimide（BDM）resin.Then,a kind of modified BMI resin of moderate-temperature curing was prepared.The results show that the prepolymer of the modified BMI resin has good liquidity at temperature of 95-140 ℃,which is suitable for dipping reinforced material.The post curing temperature of the modified BMI resin is 50-60℃lower than that of the treatment without TBHP catalyst.Two glass transition temperatures of the cured modified BMI resin are high up to 296.4 ℃ and 334.8 ℃,respectively;5% weight loss temperature is 411.4 ℃;the bending strength and the impact strength reach 122.6 MPa and 11.8 kJ·m^-2,respectively.The modified BMI resin with high temperature resistance and high toughness can be used as the matrix resin for advanced composite materials.

关 键 词：双马来酰亚胺 增韧 耐热 中温固化 

分 类 号：O063[理学]