Abstract A series of copolymers poly(butylene 2,6-naphthalate-co-butylene furandicarboxylate) (PBNFs) derived from 2,5-furandicarboxylic acid (FDCA) were synthesized. The molecular weight, microstructures, thermal and mechanical properties were characterized. DSC results show that PBN and PBNF25 can crystallize rapidly. However, the crystallization rates of PBNF50, PBNF75 and PBF are very slow. The Td,5% and Td,max values of all polyesters were higher than 360 °C and 390 °C, respectively. Compared with PBN, PBNF25, PBNF50, PBNF75 and PBF exhibited much higher elongation at break (214–295%) and bio-based content (46–100%).

中文翻译：

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衍生自 2,5-呋喃二甲酸 (FDCA) 的生物基共聚酯聚（2,6-萘二甲酸丁二醇酯-co-呋喃二甲酸丁二醇酯）：合成、表征和性质

摘要 以2,5-呋喃二甲酸(FDCA)为原料合成了一系列聚(2,6-萘二甲酸丁二醇酯-呋喃二甲酸丁二醇酯)共聚物(PBNFs)。表征了分子量、微观结构、热性能和机械性能。DSC结果表明PBN和PBNF25可以快速结晶。然而，PBNF50、PBNF75 和 PBF 的结晶速度非常慢。所有聚酯的 Td,5% 和 Td,max 值分别高于 360 °C 和 390 °C。与 PBN 相比，PBNF25、PBNF50、PBNF75 和 PBF 表现出更高的断裂伸长率（214-295%）和生物基含量（46-100%）。