氧化诱导期

高密度聚乙烯树脂氧化诱导期的热分析

Thermal Analysis of OIT of HDPE Resin

用氧化诱导期（OIT）和红外吸收光谱（IR）对这4种材料中的抗氧剂的损耗动力学进行了研究。

The depletion process of antioxidants in the resins has been tracked by use of oxidation induction time ( OIT ) and infrared absorption spectra ( IR ) .

200℃氧化诱导期在65min左右；

The oxydation induction period is about 65 min at 200 ℃;

氧化诱导期测试条件的选择与确定

Selection of test conditions for the determination of oxidative inductive time

氧化诱导期终点测定方法，系统研究和论述了抗氧化剂的抗氧化活性的测定及评价方法.对不同方法进行了综合比较与评价。

Determination methods of endpoints of autoxidation induction periods .

当单独使用时氧化诱导期几乎是抗氧剂1010的1.8倍，抗氧剂3114的1.5倍。

The induction period of oxidization was nearly 1.8 times of antioxidant 1010 and 1.5 times of antioxidant 3114 when it was used alone .

为了改善天然橡胶的热氧老化性能，试验了防老剂D提纯品和工业品对天然橡胶热氧老化性能的影响，测试了其热氧化诱导期、热失重、热老化的性能变化。

In order to improve the effect of antioxidant D on the thermal oxidative ageing properties of natural rubber ( NR ), antioxidant D of different purities are added in NR.

结果表明，合成产物能显著提高润滑油的氧化诱导期和起始氧化温度，具有优良的抑制氧化作用。

Results show that the molybdenum compounds can increase both oxidation induction period and oxidation initial temperature of lubricants , which means the molybdenum compounds have good inhibition of oxidation .

用加压差式扫描量热仪测定润滑脂的氧化诱导期和起始氧化温度，可以计算出润滑脂的活化能，从化学动力学的角度评价润滑脂的氧化稳定性。

The activation energy of grease can be calculated through determining oxidation induction time and initiative oxidation temperature of grease by pressurized differential scanning calorimetry , and the oxidation stability of grease can be evaluated form the view of chemical dynamics .

抗燃油在加速氧化反应中存在诱导期和加速期两个阶段，诱导期内产酸反应为0级反应。

There are two stages , namely induction stage and speed up stage , in accelerated oxidation reaction . In the induction stage , the acid - forming reaction belongs to 0 grade reaction .

选取烃类局部氧化物理参数（氧化诱导期、最高反应温度）来表达并计算汽油辛烷值，并根据所建立的关系式测定汽油辛烷值。

The sectional oxidation parameters of hydrocarbon can be used to express and calculate octane numbers . formed is reacted with excess of iodide in an acidic medium to give free iodine ( I ?)