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(Eur. Polym. J.) Synthesis of Fully Bio-based Diepoxy Monomer with Dicyclo Diacetal for High-performance, Readily Degradable Thermosets
来源:马松琪教授个人网站 发布日期:2019-05-18
作者:Wangchao Yuan, Songqi Ma,* Sheng Wang, Qiong Li, Binbo Wang, Xiwei Xu, Kaifeng Huang
关键字:lignin,biomass,renewable resources,cyclic acetal ,recycle
论文来源:期刊
具体来源:European Polymer Journal
发表时间:2019年

Thermosets are very versatile owing to their high dimensional stability, chemical resistance and thermal and mechanical properties; however, they are difficult to be recycled or reworked because of their permanent cross-linked structure. In this paper, we synthesized a novel fully bio-based diepoxy monomer via acetalization of lignin derivative vanillin with bio-based polyol erythritol followed by reacting with bio-derived epichlorohydrin. Due to the degradability of dicyclo diacetal structure in the diepoxy monomer, the cross-linked epoxy network could be readily decomposed (completely dissolved in 1M HCl solution at 50 °C within 40 min). While it was stable under neutral and basic conditions even during hot-humid aging test. Meanwhile, due to the rigidity of the dicyclo diacetal structure, it showed high glass transition temperature of 184 °C, and its modulus (4.7 GPa) and hardness (0.30 GPa) are even higher than those of conventional bisphenol A epoxy resin. 


 论文免费下载链接:https://authors.elsevier.com/a/1Z52c3GBFKJ~U

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