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首页> 外文期刊>Polymers for advanced technologies >Analysis of curing of diglycidyl ether of bisphenol A (BADGEn=0) with 2-adamantylethanamine
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Analysis of curing of diglycidyl ether of bisphenol A (BADGEn=0) with 2-adamantylethanamine

机译：双酚A（BADGEN = 0）用2-吲哚乙基胺的二缩水甘油醚固化分析

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摘要

The epoxy resin diglycidyl ether of Bisphenol A (BADGE n = 0) has been cured with a new synthesized hardener (2-adamantylethanamine) and the crosslinking reaction was characterized by DSC. Values of 413.3 J/g and 95 degrees C have been obtained for the enthalpy of the reaction and the glass transition temperature, respectively. The experimental results obey Kamal's model over all conversion range of temperatures (70 degrees C-100 degrees C). The activation energies of the mechanisms involved in the curing reaction have been determined for both the autocatalytic and then-order mechanism, the values being 63.3 and 29.8 kJ/mol, respectively. The value forT(g)is 23 degrees C higher than the one for (BADGE n = 0)/amantadine, while the activation energy for then-order mechanism is around 13 kJ/mol lower. This is consistent with a higher steric effect of the adamantyl group in the second hardener since it will hinder the opening the oxirane ring by the nitrogen atom of the amino group. As the polymerization reaction progress, this effect will disappear as the distance adamantyl-oxirane increase when new oxirane groups react with the hydroxyl groups (autocatalyzed reaction). Consequently, by selecting the appropriate cross-linking agent, it is possible to simultaneously increaseT(g)while reducing theactivation energy, two effects which may be desirable for some industrial applications of the material.
机译：用新合成的固化剂（2-金刚乙胺）固化双酚A环氧树脂二缩水甘油醚（BADGE n=0），并用DSC表征交联反应。反应焓和玻璃化转变温度分别为413.3 J/g和95℃。在所有温度转换范围内（70℃-100℃），实验结果都符合Kamal的模型。对于自催化和有序机理，测定了固化反应中涉及的机理的活化能，其值分别为63.3和29.8 kJ/mol。forT（g）的值比（BADGE n=0）/金刚烷胺的值高23摄氏度，而有序机制的活化能约低13千焦/摩尔。这与第二种硬化剂中金刚烷基的更高空间效应一致，因为它会阻止氨基的氮原子打开环氧乙烷环。随着聚合反应的进行，当新的环氧乙烷基团与羟基反应（自催化反应）时，这种效应将随着金刚烷基环氧乙烷距离的增加而消失。因此，通过选择合适的交联剂，可以同时增加T（g），同时降低活化能，这两种效果对于材料的某些工业应用可能是可取的。

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