以可再生资源为原料合成高分子材料具有节约资源和保护环境的双重功效，是当前高分子领域的一个重要发展方向。目前有关生物基热固性树脂的研究相对较少。以石油基双酚A为主要原料的双酚A类环氧树脂占通用环氧树脂总产量85%以上，由于该类环氧树脂潜在的生理毒性，已被禁止用于与食品或人体接触。由淀粉或纤维素水解、氧化而来的2,5-呋喃二甲酸在化学结构上与双酚A具有相似性，通过结构设计，预计可以得到与双酚A环氧树脂性能接近的生物基环氧树脂。本项目拟以2,5-呋喃二甲酸为原料，合成系列生物基环氧树脂和固化剂，并研究其固化物的热、力学性能，建立结构与性能的关系,为合成高性能生物基环氧树脂提供新原料和新方法；通过D-A加成反应在呋喃环上引入柔性侧链，在不改变环氧固化物交联密度及骨架刚性的情况下，得到自增韧的环氧树脂，研究环氧树脂新的增韧机理，为高性能生物基环氧树脂的分子设计提供新的理论依据，归纳和总结一般规律。

Due to the fact that the conversion of biomass to useful polymers or composites has considerable economical and environmental values,the synthesis of bio-based polymers is an important subject. Nowadays, the research on bio-based thermosetting resins has been overlooked compared with the research on bio-based plastics. Diglycidyl ether of bisphenol A (DGEBA), which represents more than 85% of the epoxy precursors in the world, is almost dependent on fossil resources and appears to be toxic to living organisms. It's application has been strictly limited in many countries. 2,5-furandicarboxylic acid is an important platform chemical derived from cellulose or starch, which possesses the similar chemical structure to that of bisphenol A.It is possible for us to synthesize the bio-based epoxy from 2,5-furandicarboxylic acid with comparable properties to that of DGEBA. In this proposal,2,5-furandicarboxylic acid is employed as the starting material to synthesize the bio-based epoxy and curing agents. After the properties of this novel epoxy system were investigated, the new method about how to design and synthesize high performance bio-based epoxy will be provided. Furthermore,the long soft molecule will be introduced to the epoxy system via D-A reaction to promote its mechanical properties of toughness. The self-toughening mechanism of this new epoxy will be carefully studied and the regular pattern will be disclosed.