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通过热重分析法（ＴＧ）、差动热分析法（ＤＳＣ）和红外光谱分析法（ＩＲ），研究了环境气氛和氮气气氛下端羟基聚丁二烯（ＨＴＰＢ）热氧化反应动力学和反应机理，应用ＤＳＣ测定了环境气氛下ＨＴＰＢ的氧化反应峰峰温，求得了ＨＴＰＢ氧化反应表观活化能Ｅ，指前因子Ａ，反应速率常数ＫＴ。运用Ｄｏｌｙｅ公式求出了氧化反应诱导期ｔｉ，由此确定防老剂Ｈ和抗氧剂Ａｔ－２１５的最佳含量，Ａｔ－２１５对ＨＴＰＢ的防老化作用优于防老剂Ｈ。实验表明：环境气氛下１６０°Ｃ～２５０°Ｃ温度范围内ＤＳＣ曲线上的第一个放热峰以及ＴＧ曲线上对应的增重部分是由于环境气氛中的氧加入到ＨＴＰＢ骨架上所致；随着温度的升高，碳碳双键（１６３７ｃｍ－１）伸缩吸收峰逐渐减弱，同时羰基（１６９４ｃｍ－１）吸收峰和羟基（３３３０ｃｍ－１）吸收峰逐渐增强；ＫＴ与ｔｉ可以表征防老剂的防老化效果。
The kinetics and reaction mechanism of thermal oxidation of hydroxyl-terminated polybutadiene (HTPB) under ambient atmosphere and nitrogen atmosphere were investigated by TG, DSC and IR spectroscopy. , The peak-to-peak temperature of oxidation reaction of HTPB under ambient atmosphere was measured by DSC, and the apparent activation energy E, pre-exponential factor A and reaction rate constant KT of HTPB oxidation reaction were obtained. The oxidation reaction induction period ti was obtained by Dolye’s formula, and the optimum content of antioxidant H and antioxidant At-215 was determined. The anti-aging effect of At-215 on HTPB was better than that of antioxidant H. Experiments show that the first exothermic peak on the DSC curve and the corresponding weight gain on the TG curve in the ambient temperature range from 160 ° C to 250 ° C are due to the addition of oxygen in the ambient atmosphere to the HTPB framework. With the increase of temperature, the stretching absorption of carbon-carbon double bond (1637cm-1) gradually decreased, while the absorption peak of carbonyl (1694cm-1) and hydroxyl (3330cm-1) Anti-aging effect.