文献类型：期刊文献

英文题名：Influence of crosslinking density on the mechanical and thermal properties of plant oil-based epoxy resin

作者：Huang, Jinrui[1,2] Fu, Pan[2] Li, Wenbin[2] Xiao, Laihui[2] Chen, Jie[2] Nie, Xiaoan[2]

第一作者：黄金瑞

通信作者：Huang, JR[1];Huang, JR[2];Nie, XA[2]

机构：[1]Chinese Acad Forestry, Inst Ecol Conservat & Restorat, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat F, Key Lab Biomass Energy & Mat Jiangsu Prov,Natl En, Key Lab Chem Engn Forest Prod,Natl Forestry & Gra, Nanjing 210042, Jiangsu, Peoples R China

年份：2022

卷号：12

期号：36

起止页码：23048-23056

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20223712715998);Scopus(收录号：2-s2.0-85137578714);WOS:【SCI-EXPANDED(收录号:WOS:000840706600001)】；

基金：This work was financially supported by Fundamental Research Funds of Research Institute of Forest New Technology, CAF (CAFYBB2019SY028), and the Fundamental Research Funds for the Central Non-profit Research Institution of CAF (CAFYBB2020QB006).

语种：英文

外文关键词：Curing - Density (specific gravity) - Drying oils - Elastic moduli - Glass transition - Oilseeds - Stability - Tensile strength - Thermodynamic properties

摘要：Plant oil-based epoxy resins are of great interest due to their ecological and economic necessity. Previous studies suggested that the crosslinking density had a considerable influence on the mechanical and thermal properties of plant oil-based epoxy resins. However, so far, the relationship between the crosslinking density and the thermo-mechanical properties of plant oil-based epoxy resins is not clear. To address this issue, model tung oil-based epoxy resins with different crosslinking densities were fabricated to investigate the influence of crosslinking density on the mechanical and thermal properties of tung oil-based epoxy resins. Results show that the tensile strength, Young's modulus, and glass transition temperature are linearly increased with increasing crosslinking density. The elongation at break and tensile toughness show nonlinear downward trends as the crosslinking density increases. The elongation at break decreases gently at first, then dramatically, and finally slowly as the crosslinking density increases. The tensile toughness declines sharply at first and then slowly with increasing crosslinking density. The relationship between the thermostability and the crosslinking density is complex, because the thermostability is determined by both the molecular structure of the curing system and the crosslinking density. These results provide some information for designing plant oil-based epoxy resins according to the requirements of their applications.