交联密度对环氧树脂低温性能及液氧相容性的影响  

Effect of crosslinking density on the low temperature performance and liquid oxygen compatibility of epoxy resin

作　　者：傅伟 蔡浩鹏[1] 吴熊 王钧[1] FU Wei;CAI Hao-peng;WU Xiong;WANG Jun(School of Materials Science Engineering,Wuhan University of Technology,Wuhan 430070,China;Hubei Huaqiang High-Tech Co.,Ltd,Yichang 443000,China)

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070 [2]湖北华强科技有限责任公司,湖北宜昌443000

出　　处：《热固性树脂》2018年第5期31-34,共4页Thermosetting Resin

基　　金：国家技术基础资助(Grant No.JCKY2016110C008)

摘　　要：采用二氨基二环己基甲烷（PACM）与丙烯腈反应制备了具有不同分子质量的胺固化剂以改变树脂体系的交联密度。通过动态热力学分析仪测试（DMA）、力学性能测试和液氧敏感测试，研究了交联密度对环氧固化物的耐热性、低温性能及液氧相容性的影响。结果表明，随着环氧树脂交联密度的降低，其玻璃化转变温度（T8）随之降低，低温老化后弹性模量变化率变小，液氧敏感系数变小，液氧相容性提高。The curing agents with different molecular weights for changing the crosslinking density of epoxy resin systems were synthesized by the reaction of diaminodicyclohexylmethane （PACM） with acrylonitrile. The effects of crosslink density on heat resistance, low temperature performance and liquid oxygen compatibility of cured epoxy resins were investigated by dynamic thermomechanical analyzer test （DMA）, mechanical property test and liquid oxygen sensitivity test. The results showed that the glass transition temperature （T8） was decreased with the decreasing of crosslink density of epoxy resin. The change rate of elastic modulus was decreased after low temperature aging.The sensitivity coefficient of liquid oxygen was smaller and the compatibility of liquid oxygen was improved.

关 键 词：交联密度 环氧树脂 耐热 低温 弹性模量 液氧相容性 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]