A monomer fully based on renewable materials was prepared from methyl 2-furoate and levulinic acid by condensation reaction under acidic conditions. The monomer is used for the synthesis of ion-exchange polyamides based on a new family of bisfuranic diesters. Polyamides prepared using typical melt polycondensation have provided a relatively simple and reliable way of preparing linear furanic polycondensates bearing regular structures with high yield. The ion-exchange polyamides were characterized by Fourier transform infrared spectroscopy and elemental analysis. The thermal behavior of the polymers was studied by differential scanning calorimetry and thermogravimetric analysis. The ion-exchange capacity was determined by direct titration of the dry polymer.

中文翻译：

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与生物基二胺缩聚的绿色离子交换双呋喃聚酰胺

由2-糠酸甲酯和乙酰丙酸通过在酸性条件下的缩合反应制备完全基于可再生材料的单体。该单体用于基于新的双呋喃二酯家族的离子交换聚酰胺的合成。使用典型的熔融缩聚制备的聚酰胺提供了相对简单和可靠的方式来以高收率制备具有规则结构的线性呋喃缩聚物。通过傅立叶变换红外光谱和元素分析对离子交换聚酰胺进行了表征。通过差示扫描量热法和热重分析法研究了聚合物的热行为。离子交换容量通过直接滴定干燥的聚合物来确定。