丁腈橡胶热氧老化与防护的研究进展及反应机理探讨  

Research progress and discussion on reaction mechanism of thermal oxidation aging and protection for nitrile rubber

作　　者：张守汉[1,2] 高艳[3] 于建[2] 郑彩琴[1] 高志兴[1] 李晓军[4] 

机构地区：[1]中国石油兰州石化公司合成橡胶厂,兰州730060 [2]清华大学化工系,北京100084 [3]中国石油兰州石化公司生产技术处,兰州730060 [4]中国石油兰州石化公司乙烯厂,兰州730060

出　　处：《合成橡胶工业》2017年第3期240-245,共6页China Synthetic Rubber Industry

摘　　要：综述了国内外丁腈橡胶(NBR)热氧老化及防护的研究进展,探讨了NBR热氧老化及2种防护类型的化学反应机理。NBR生胶热氧老化后使得分子链断裂生成带有醛、酮等基团的聚合物,并产生HCN、NH_3等小分子化合物。胺类是抗热氧老化最佳的链终止型防老剂,酚类、烷基苯基亚磷酸酯类和硫酯类化合物的单一组分或复合体系是破坏氢化过氧化物型防老剂,硫酯类防老剂具有高效的抗热氧老化效果。The research progress of thermal oxida- tion aging and protection for nitrile rubber were re- viewed with 17 references, the thermal oxidation re- actions and the chemical reaction mechanisms of two kinds of protection were discussed. After thermal oxidation aging of nitrile rubber , the ldehyde and ketone groups were formed when the polymer chain was broken, meanwhile, some small molecules such as HCN, NHa generated. The antioxidants as amines, phenols, alkyl phenyl phosphite esters and thioesters compounds, used singlely or mixed in ni- trile rubber, were effectively to termminate chain radicals and destruct hydrogen peroxide. Thioesters was more effetive for antioxidation.

关 键 词：丁腈橡胶 热氧老化 防老剂 反应机理 综述 

分 类 号：TQ333.7[化学工程—橡胶工业]