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弹性体部件的长期功能在很大程度上取决于热氧老化过程和腐蚀介质的化学作用、臭氧或机械载荷的作用。破坏程度主要取决于温度、氧的影响以及弹性体的组成,尤其是聚合物结构,还有防老剂类型和含量。宏观上这些过程导致弹性体基体变脆或变硬,或者软化或发粘。为了抑制老化过程,延长材料的使用寿命,需要了解其中的化学反应和交联。使用防老剂以达成延长使用寿命的目的。了解防老剂的作用、长期效果和反应机理及其中间产物和分解产物是非常有意义的。
The long-term function of elastomeric parts depends very much on the thermo-oxidative aging process and on the corrosive media chemistry, ozone or mechanical loading. The degree of damage depends mainly on the temperature, the effect of oxygen and the composition of the elastomer, especially the polymer structure, as well as the type and amount of antioxidant. Macroscopically these processes result in the elastomer matrix becoming brittle or hardened, or softened or tacky. In order to suppress the aging process and extend the service life of the material, it is necessary to understand the chemical reaction and the crosslinking therein. The use of antioxidants in order to achieve the purpose of extending the service life. Understanding the role of antioxidants, long-term effects and reaction mechanisms and their intermediates and decomposition products is of great interest.