文献类型：期刊文献

英文题名：Curing Behavior and Thermomechanical Performance of Bioepoxy Resin Synthesized from Vanillyl Alcohol: Effects of the Curing Agent

作者：Wang, Zhenyu[1,2,3] Gnanasekar, Pitchaimari[3] Nair, Sandeep Sudhakaran[3,4] Yi, Songlin[2] Yan, Ning[3,4]

第一作者：Wang, Zhenyu;王振宇

通信作者：Yi, SL[1];Yan, N[2];Yan, N[3]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Beijing Forestry Univ, Beijing Key Lab Wood Sci & Engn, Beijing 100083, Peoples R China;[3]Univ Toronto, Dept Chem Engn & Appl Chem, Toronto, ON M5S 3E5, Canada;[4]Univ Toronto, John H Daniels Fac Architecture Landscape Design, Toronto, ON M5S 2J5, Canada

年份：2021

卷号：13

期号：17

外文期刊名：POLYMERS

收录：;EI(收录号：20213610852346);Scopus(收录号：2-s2.0-85114051760);WOS:【SCI-EXPANDED(收录号:WOS:000694319100001)】；

基金：This research was funded by Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery Grant (RGPIN-2017-067) and the scholarship program of China Scholarship Council (No. 201806510028).

语种：英文

外文关键词：bio-based epoxy resin; vanillyl alcohol; aliphatic amines; curing system; thermomechanical properties

摘要：In order to reduce the dependency of resin synthesis on petroleum resources, vanillyl alcohol which is a renewable material that can be produced from lignin has been used to synthesize bioepoxy resin. Although it has been widely reported that the curing reaction and properties of the cured epoxies can be greatly affected by the molecular structure of the curing agents, the exact influence remains unknown for bioepoxies. In this study, four aliphatic amines with different molecular structures and amine functionalities, namely triethylenetetramine (TETA), Tris(2-aminoethyl)amine (TREN), diethylenetriamine (DETA), and ethylenediamine (EDA), were used to cure the synthesized vanillyl alcohol-based bioepoxy resin (VE). The curing reaction of VE and the physicochemical properties, especially the thermomechanical performance of the cured bioepoxies with different amine functionalities, were systematically investigated and compared using different characterization methods, such as DSC, ATR-FTIR, TGA, DMA, and tensile testing, etc. Despite a higher curing temperature needed in the VE-TETA resin system, the cured VE-TETA epoxy showed a better chemical resistance, particularly acidic resistance, as well as a lower swelling ratio than the others. The higher thermal decomposition temperature, storage modulus, and relaxation temperature of VE-TETA epoxy indicated its superior thermal stability and thermomechanical properties. Moreover, the tensile strength of VE cured by TETA was 1.4 similar to 2.6 times higher than those of other curing systems. In conclusion, TETA was shown to be the optimum epoxy curing agent for vanillyl alcohol-based bioepoxy resin.