环氧树脂/蒙脱土/2-己基-4-甲基咪唑纳米复合材料的固化行为  

CURE BEHAVIOR OF EPOXY RESIN/MONTMORILLONITE/ 2-ETHYL-4-METHYL-IMIDAZOLE NANOCOMPOSITE

作　　者：陈大柱[1] 何平笙[1] 

机构地区：[1]中国科学技术大学高分子科学与工程系,安徽合肥230026

出　　处：《高分子材料科学与工程》2004年第5期182-185,共4页Polymer Materials Science & Engineering

摘　　要：用动态扭振法研究了不同蒙脱土用量的环氧树脂/有机蒙脱土/2-己基-4-甲基咪唑纳米复合材料的等温固化过程。随固化温度的提高,凝胶化时间tg和达最大固化速率的时间ti缩短,固化速率加快,Avrami速率常数k增大。蒙脱土的加入加速了环氧体系的固化反应,但对表观活化能的影响不大,对纳米复合材料的形成过程没有特殊的影响。用非平衡态热力学涨落理论对纳米复合材料的固化作了理论预估,与实验固化曲线能很好地吻合。The isothermal cure behavior of epoxy resin EP/organo-montmorillonite (Org-MMT) /2-ethyl-4-methylimidazole (2,4-EMI) intercalated nanocomposites containing various Org-MMT loadings have been investigated by the dynamic torsional vibration method (DTVM). With increasing the cure temperature, the gel time t__g and the time arriving at the maximum rate after the gel point t__i decreases, the cure rate is accelerated, and as well the Avrami rate constant is raised. The addition of Org-MMT speeds up the cure rate but has little effect on the apparent activation energy of cure reaction, indicating that it has no special effect on the forming process of nanocomposite. The non-equilibrium thermodynamic fluctuation theory was used to predict the cure process of the nanocomposite and the theoretical prediction was in good agreement with the experimental cure curves.

关 键 词：动态扭振法 环氧树脂/蒙脱土/2-己基-4-甲基味唑纳米复合材料 Flory凝胶化理论 Avrami方程 非平衡态热力学涨落理论 固化行为 力学性能 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业] TB383[一般工业技术—材料科学与工程]