Environmental concerns are driving scientists in a quest for more sustainable products and processes. In the development of bis-benzoxazines, a novel class of thermosetting resins, which are receiving considerable attention from academia and industry, bisphenol A (BPA) and toxic solvents are still drawbacks that need to be overcome. Renewable feedstocks, neoteric solvents, and energy-efficient heating sources are sophisticated alternative solutions to the current traditional methodologies. In the current study, an eco-friendly approach to a fully biobased thermosetting resin from lignocellulose-derived products is reported. Catechol and furfurylamine are successfully fused into bis-benzoxazines in only a few minutes under microwave irradiation in the presence of poly(ethylene glycol) as solvent. The workup procedure requires minimum amounts of methanol for complete purification of the product in good yields, which is characterized by Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), and ¹H and ¹³C nuclear magnetic resonance spectroscopy (NMR). As used in the development of high-performance polymers, novel copolymerized polybenzoxazines are evaluated by thermogravimetric analysis (TGA) and dynamic mechanical analysis (DMA).

中文翻译：

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在环境友好的条件下开发完全基于生物的高性能双苯并恶嗪

环境问题正驱使科学家们寻求更可持续的产品和工艺。在双类苯并恶嗪的开发中，一类新型的热固性树脂受到了学术界和工业界的极大关注，双酚A（BPA）和有毒溶剂仍然是需要克服的缺陷。可再生原料，新型溶剂和高效节能的热源是当前传统方法的复杂替代解决方案。在当前的研究中，报道了从木质纤维素衍生的产品中完全生物基热固性树脂的生态友好方法。在聚乙二醇作为溶剂存在下，在微波辐射下，仅几分钟内就可以将邻苯二酚和糠胺成功地融合到双苯并恶嗪中。¹ H和¹³ C核磁共振波谱（NMR）。在开发高性能聚合物时，通过热重分析（TGA）和动态力学分析（DMA）对新型共聚的聚苯并恶嗪进行了评估。