Abstract: The accelerated oxidation reaction was carried out on an oxidation simulator in order to study the oxidative stability of methyl linoleate. The properties of oxidative oil, such as peroxide value, acid value and kinematic viscosity(40 ℃), were analyzed at intervals of 1 hour. The rate of test sample oxidation was explored under the condition of different temperature and oxygen flow rate. And the oxidation process of methyl linoleate was further characterized through Fourier transform infrared spectroscopy and ultravioletvisible light detector. In addition, the induction period of methyl linoleate was determined by the Rancimat method. The oxidation of oil sample was further studied through determining the reaction activation energy. The results showed that the oxidation stability was well at different oxygen flow rate, but obviously decreases with the increase of temperature. Otherwise, it was consequently demonstrated that the induction period decreased with the increase of temperature, and the activation energy obtained from Arrhenius equation was 36.003 kJ/mol.

Key words: Methyl linoleate,    , Oxidative stability,    , Induction period,    ,  Activation energy

摘要： 为了考察亚油酸甲酯的氧化安定性, 采用自制氧化模拟装置将样品加速氧化, 定时取样检测样品过 氧化值、 酸值和运动黏度( 4 0℃) , 考察了不同温度和氧气流量对氧化速率的影响; 利用傅立叶红外光谱和紫外可见 分光光度计定性表征了亚油酸甲酯氧化前后的结构变化; 通过R a n c i m a t法加速氧化实验, 测定了亚油酸甲酯的氧化 诱导期, 同时从氧化反应活化能角度进一步研究亚油酸甲酯的氧化反应。结果表明, 随氧气流量改变, 亚油酸甲酯 氧化安定性较好, 但随着反应温度的升高, 氧化诱导期缩短, 氧化安定性明显下降; 通过计算得到氧化反应表观活化 能是3 6. 0 0 3k J /m o l 。

关键词: 亚油酸甲酯,  , 氧化安定性,  , 诱导期, 活化能