Three epoxy resins castor oil glycidyl ether (COGE), epoxidized castor oil glycidyl ether (ECOGE) and hydrogenated castor oil glycidyl ether (HCOGE) have been synthesized based on castor oil through a mild epoxidation reaction. The research on curing performance shows that the modified products could improve the toughness of traditional epoxy resins remarkably. Moreover, when adding a small amount of products into traditional epoxy resin E‐51, the mechanical properties of the cured products were also significantly improved. Specifically, by blending ECOGE into E‐51 at a ratio of 5%, the tensile strength, elongation at break, and impact resistance of the cured product were improved by 27.5%, 33.9%, and 39.7%, respectively, from 64.03 MPa, 3.15% and 11.37 MPa to 81.61 MPa, 4.4%, and 15.22 MPa. DMA illustrated that after incorporating, the crosslinking density of the cured product increase, but the glass transition temperatures were reduced by more than 20°C compared with E‐51. SEM showed that COGE and ECOGE caused the cured products to exhibit tough fracture. TGA explained that the initial decomposition temperatures of the mixed systems reduced, but the high temperature resistance of the cured products improved. The design strategy based on castor oil highlights a sustainable avenue for preparing cost‐effective and high‐efficiency epoxy resins.

中文翻译：

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蓖麻油基三缩水甘油醚环氧树脂的合成与固化性能

以蓖麻油为基础，通过温和的环氧化反应合成了三种环氧树脂：蓖麻油缩水甘油醚（COGE），环氧化蓖麻油缩水甘油醚（ECOGE）和氢化蓖麻油缩水甘油醚（HCOGE）。固化性能的研究表明，改性产品可以显着提高传统环氧树脂的韧性。此外，当在传统环氧树脂E-51中添加少量产品时，固化产品的机械性能也得到了显着改善。具体而言，通过将ECOGE以5％的比例掺入E-51中，固化产品的拉伸强度，断裂伸长率和抗冲击性分别从64.03 MPa提高了27.5％，33.9％和39.7％， 3.15％和11.37 MPa至81.61 MPa，4.4％和15.22 MPa。DMA说明，合并后，固化产物的交联密度增加，但与E-51相比，玻璃化转变温度降低了20°C以上。SEM显示，COGE和ECOGE导致固化产物显示出坚硬的断裂。TGA解释说，混合体系的初始分解温度降低了，但是固化产物的耐高温性得到了改善。基于蓖麻油的设计策略强调了制备经济高效的环氧树脂的可持续途径。但是固化产物的耐高温性得到改善。基于蓖麻油的设计策略强调了制备经济高效的环氧树脂的可持续途径。但是固化产物的耐高温性得到改善。基于蓖麻油的设计策略强调了制备经济高效的环氧树脂的可持续途径。