The preparation of recyclable cross-linked polymers by combining biomass-based resources with dynamic covalent bonds is a promising strategy for the preparation of sustainable and recyclable thermosetting materials. In this paper, a biomass-based epoxy resin was synthesized from anisaldehyde, and then a biomass-based polymeric material was prepared using Diels–Alder chemistry. The biomass-based material exhibits high mechanical strength and light transparency. The tensile strength and elongation of the biomass-based material at a temperature of 315 °C with a weight loss of 5% (T_d5) were 79.7 MPa and 12.2%, respectively, which are higher than those of material synthesized from petroleum-based (bisphenol A) epoxy resin. The biomass-based film material with a thickness of 0.14 mm has a transmittance of up to 89% in the light wavelength range of 550–1200 nm. Moreover, the biomass-based material showed good recyclability.

中文翻译：

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一种基于苯甲醛衍生的 Diels-Alder 交联网络的新型可回收聚合物


通过将生物质基资源与动态共价键相结合来制备可回收的交联聚合物是制备可持续和可回收热固性材料的一种有前途的策略。在本文中，以茴香醛为原料合成了生物质基环氧树脂，然后使用 Diels-Alder 化学制备了生物质基聚合物材料。这种生物质基材料具有很高的机械强度和光透明度。在 315 °C 的温度下，生物质基材料在失重 5% （T_d5） 的温度下的拉伸强度和伸长率分别为 79.7 MPa 和 12.2%，高于石油基（双酚 A）环氧树脂合成的材料。厚度为 0.14 mm 的生物质基薄膜材料在 550–1200 nm 的光波长范围内具有高达 89% 的透射率。此外，生物质基材料表现出良好的可回收性。