An analysis of the substitution effects involved in diepoxide‐diamine copolymerization reactions
An analysis of the substitution effects involved in diepoxide‐diamine copolymerization reactions
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双环氧化物-二胺共聚反应中的取代效应分析
DOI：
10.1002/pol.1980.170180221
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发表时间：
1980
期刊：
影响因子：
--
通讯作者：
J. Charlesworth
中科院分区：
文献类型：
--
作者：
J. Charlesworth
芳香胺和双环氧化物单体中存在的官能团的相对反应性已通过凝胶渗透色谱法进行了研究。苯胺和苯基缩水甘油醚之间的反应所涉及的仲胺氢和伯胺氢消耗的速率常数之比经计算约为0.5。在N-甲基苯胺和双酚A二缩水甘油醚(DGEBA)之间的反应的情况下，DGEBA分子中第一和第二环氧基团消耗的速率常数比也约为0.5。与之前公布的数据相反，这些结果表明取代效应对于芳香胺和 DGEBA 来说并不重要。此外，以胺-环氧化物反应为代价消耗环氧基团的醚化副反应似乎也微不足道。
The relative reactivity of the functional groups present in aromatic amine and diepoxide monomers has been investigated by gel permeation chromatography. The ratio of rate constants for the consumption of the secondary and primary amine hydrogens involved in the reaction between aniline and phenyl glycidyl ether has been calculated to equal approximately 0.5. In the case of the reaction betweenN‐methy aniline and diglycidyl ether of bisphenol A (DGEBA) the rate constant ratio for the consumption of the first and second epoxide groups in the DGEBA molecule is also approximately 0.5. In contradiction to previously published data these results suggest that substitution effects are unimportant for aromatic amines as well as DGEBA. Furthermore, etherification side reactions, consuming epoxide groups at the expense of the amine–epoxide reaction, also appear to be insignificant.