Abstract

Epoxy-based porous monoliths are prepared by chemically induced phase separation. The roles played by N,N-dimethylformamide (DMF) in both curing and phase separation kinetics are studied in detail. It is found that the addition of DMF not only changes the speed of phase separation, but the way. Meanwhile, the occurrence of secondary phase separation is partly inhibited, which is in favor of the formation of skeletal network structure. In addition, the schematic pseudo phase diagrams were deduced, which are of great significance to understand the roles played by DMF for the targeted control of materials structure. The results show that by the addition of DMF, the phase diagram moves to the lower right, which means more porogen is needed to obtain skeletal network structure. The spinodal line moves toward the binodal line and the internal space of spinodal line is enlarged. Therefore, it becomes more available to obtain skeletal network structure.

中文翻译：

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DMF在环氧树脂基多孔整料结构形成中的作用

摘要

通过化学诱导的相分离制备基于环氧树脂的多孔整料。N，N扮演的角色对二甲基甲酰胺（DMF）的固化和相分离动力学进行了详细研究。发现添加DMF不仅改变了相分离的速度，而且改变了方法。同时，部分抑制了第二相分离的发生，这有利于骨架网络结构的形成。此外，推导了示意性伪相图，这对于理解DMF对目标材料结构的控制具有重要意义。结果表明，通过添加DMF，相图移至右下角，这意味着需要更多的成孔剂才能获得骨架网络结构。旋节线朝向双节线移动，并且旋节线的内部空间扩大了。因此，它变得更容易获得骨架网络结构。