A new class of recyclable and high-performance thermosets from comb-shaped aromatic polyamides with pendent furan groups, which was prepared from a newly designed furan-containing diacid by high-temperature polycondensation in solution was reported. ¹H nuclear magnetic resonance (¹H NMR), fourier transform infrared spectroscope (FT-IR) and gel permeation chromatography demonstrated the chemical structure of target polyamides, while gelation test, ¹H NMR and FT-IR characterizations revealed the capability of these polyamides to be reversibly crosslinked by bismaleimide via Diels-Alder reaction. The use of polyamides with high molecular weight and high content of regular pendent furan groups as precursor permitted the tailoring of mechanical properties of the resultant thermosets in a broad range by simply adjusting the ratio of furan to bismaleimide. In addition, the thermally reversible cross-linking by Diels-Alder reaction allowed the repeated recycling of cross-linked polyamide with reasonable recovery in mechanical properties.

据报道，由新型设计的含呋喃二酸经溶液中的高温缩聚反应制得的具有新型呋喃基的梳状芳族聚酰胺可回收和高性能的热固性材料。¹ H核磁共振（¹ H NMR），傅立叶变换红外光谱仪（FT-IR）和凝胶渗透色谱法证明了目标聚酰胺的化学结构，而凝胶化试验表明，¹1 H NMR和FT-IR表征表明这些聚酰胺具有通过双马来酰亚胺通过Diels-Alder反应可逆交联的能力。通过使用具有高分子量和高含量的常规侧基呋喃基团的聚酰胺作为前体，可以通过简单地调节呋喃与双马来酰亚胺的比例，在宽范围内调整所得热固性塑料的机械性能。另外，通过Diels-Alder反应的热可逆交联使得交联聚酰胺能够重复循环利用，同时机械性能得到合理的恢复。