双增韧剂改性环氧树脂  

Epoxy Resin Toughed by Dual Toughening Agents

作　　者：姚兴芳[1] 李玉男[1] 孙言乐[1] 张海[1] 罗俊会[1] 

机构地区：[1]天津城市建设学院材料科学与工程系,天津300384

出　　处：《塑料》2012年第2期90-93,共4页Plastics

基　　金：建设部项目"耐高温建筑结构胶的研制及应用"(03-2-019)

摘　　要：采用双增韧剂(端羧基液体丁腈橡胶(CTBN)与纳米SiO2(n-SiO2))对环氧树脂(ER)增韧,并用正交试验方法对其增韧条件进行了优化。通过对固化产物力学性能、热稳定性及微观形态的测定及表征,结果表明:优化的胶黏剂制备条件是双增韧剂(CTBN+n-SiO2)占ER的1/8、CTBN与n-SiO2的比例为2∶1、反应温度为180℃、反应时间为2.5 h,胶黏剂冲击强度达到18.24 kJ/m2;红外表明(FTIR)双增韧剂均与ER发生作用,热重分析(TG)结果显示固化产物热稳定性良好,扫描电镜(SEM)对固化产物微观形态的观察结果显示双增韧剂对ER增韧作用明显。The epoxy resin adhesives were prepared by orthogonal experimentation method, which toughed by the dual toughening agents of the liquid end carboxyl group nitrile rubber （CTBN） and nanometer silicon dioxide （ n-SiO2 ）. The mechanical strength,thermal stability,mierograph of the adhesives were tested and studied. The results showed that when the ratio of ER and （CTBN/n-SiO2） was 8：1 ,the ratio of CTBN and SiO2 was 2：1 ,and the first ingredient reacted at 180 ℃for 2.5 h,the shearing strength,the peeling strength of the cured adhesives reached the maximum. FTIR indicated that CTBN and n-SiO2 reacted with ER. SEM and TG results indicated that the toughing of the dual toughening agents to ER was obvious and the thermal stability was excellent.

关 键 词：双增韧剂 改性 环氧树脂 冲击强度 胶黏剂 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]