環氧桐油乙酯（ETOEE）是利用桐油乙酯在不需觸媒下，與甲酸和過氧化
氢反應來產生。本研究使用兩步驟；利用氫氧化甲為觸媒催化與乙醇進行轉
酯化反應，接著進行環氧化。轉酯化條件為；桐油與乙醇的莫爾比為 1:20，
在 60℃下反應 2小時。在使用 5.86 g甲酸、14.5 g過氧化氫、10 g TOEE以及
在 50oC 下反應 3 小時後可得到的最高轉化率和產率分别為 93.6％和 87.2
％。本研究的目的是提高桐油的熱氧化稳定性、動黏度和黏度指数。在氮氣和
氧氣環境下使用熱重分析（TGA）法來證實熱氧化稳定性结果。透過使用
FTIR證實环氧基團的存在以及雙键的移除。動黏度則是使用 MCR來確定。

Epoxy tung oil ethyl ester (ETOEE) was produced by using tung oil ethyl ester (TOEE) and reacted with formic acid (FA) and hydrogen peroxide that was employed without catalyst. This study used two steps: transesterification with ethanol and KOH as catalyst followed by epoxidation. The transesterification was carried out at a molar ratio of tung oil to ethanol of 1:20, 60oC for 2 h. The highest conversion and yield are 93.6% and 87.2%, respectively which were obtained by using 5.86 g of formic acid, 14.5 g of hydrogen peroxide and 10 g of TOEE with reaction maintained at 50oC for 3 h. The objective of the research was to enhance the thermal-oxidative stability, kinematic viscosity, and analyze viscosity index of tung oil. Thermal-oxidative stability results were confirmed by using thermo gravimetric analysis (TGA) method under nitrogen and oxygen atmosphere. The presence of epoxy group and double bonds removal were clarified by using Fourier-transform infrared spectroscopy (FTIR). The kinematic viscosity was confirmed by using modular compact rheometer (MCR).

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