Cure kinetics of epoxy resin and aromatic diamines
Cure kinetics of epoxy resin and aromatic diamines
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DOI：
10.1002/app.20960
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发表时间：
2004-11-05
影响因子：
3
通讯作者：
Behmadi, H
中科院分区：
文献类型：
--
作者：
Ghaemy, M;Barghamadi, M;Behmadi, H
本文用差示扫描量热法（DSC）研究了双酚A型环氧树脂二缩水甘油醚（DGEBA）与4，4 ′-二氨基苯乙烯（DAS）和4，4 ′-二氨基偶氮苯（DAAB）的固化反应动力学。实验数据表明，固化反应是自催化反应，固化反应的所有动力学参数由半经验方程确定。在相同条件下，DGEBA与DAS的反应比与DAAB的反应快，两个体系的活化能均高于其它芳香二胺的活化能。随着等温温度和固化剂浓度的增加，反应速率常数随着环氧基团与伯胺基团碰撞几率的增加而增加，而反应活化能保持不变。(C)2004 Wiley Periodicals，Inc.
The kinetics of curing reaction of a diglycidyl ether of a bisphenol-A based epoxy (DGEBA) with 4,4'-diaminostillbene (DAS) and 4,4'-diaminoazobenzene (DAAB) as curing agents are studied by differential scanning calorimetery (DSC) using the isothermal technique. The experimental data show that the cure reaction is autocatalytic in nature, and all kinetic parameters of the curing reaction are determined using a semiempirical equation. The reaction of DGEBA with DAS is faster than that with DAAB under the same conditions and the activation energies of both systems are higher than those reported for other aromatic diamines. With increasing isothermal temperature and concentration of curing agents the rate constants are increased by the increasing of probability collisions between epoxide and primary amine groups while the activation energies remain constant. (C) 2004 Wiley Periodicals, Inc.