Preparation and properties of bio-based epoxy networks derived from isosorbide diglycidyl ether
Preparation and properties of bio-based epoxy networks derived from isosorbide diglycidyl ether
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DOI：
10.1016/j.polymer.2011.06.001
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发表时间：
2011-07-20
期刊：
影响因子：
4.6
通讯作者：
Pascault, Jean-Pierre
中科院分区：
文献类型：
--
作者：
Chrysanthos, Marie;Galy, Jocelyne;Pascault, Jean-Pierre
采用两种不同的合成路线，从异山梨醇（一种基于碳水化合物的C6结构单元）合成了两种生物基环氧预聚物。采用SEC、ESI-TOF MS、FTIR、1H NMR和13 C NMR等分析手段对生物基环氧预聚物的化学结构进行了表征。所得环氧预聚物的摩尔质量分布不同，一个由纯环氧单体组成，而另一个表现出各种低聚物。一种传统的石油基环氧预聚物，DGEBA，它具有类似的环氧当量，也用于本研究的比较。分别采用流变学和差示扫描量热法（DSC）研究了两种生物基环氧树脂前体与氨基固化剂异佛尔酮二胺的交联反应，并考察了化学计量比n（ah）/n（e）的影响。使用动态力学分析（DMA）和热重分析（TGA）的环氧网络的结构进行了评价。(C)2011爱思唯尔有限公司保留所有权利。
Two bio-based epoxy prepolymers were synthesized from isosorbide, a carbohydrate-based C6 building block, using two different synthetic routes. The chemical structures of the bio-based epoxy prepolymers were analyzed by SEC, ESI-TOF MS, FTIR, H-1 NMR and C-13 NMR analysis. The resulting epoxy prepolymers differ by the molar mass distribution, one consists of the pure epoxy monomer whereas the other exhibits various oligomeric species. A traditional petroleum-based epoxy prepolymer, DGEBA, which has similar epoxy equivalent weight, was also used in this study for comparison. Gelation and crosslinking reactions of the two bio-based epoxy precursors with an amino hardener, isophorone diamine, were studied using rheological measurements and differential scanning calorimetry (DSC) respectively; the effect of the stoichiometric ratio n(ah)/n(e) was investigated. Structures of the epoxy networks were evaluated using dynamic mechanical analysis (DMA) and thermo gravimetric analysis (TGA). (C) 2011 Elsevier Ltd. All rights reserved.