双功能型羟胺类抗氧剂的进展

Progress of Bi-Functional Hydroxylamine Antioxidants

抗氧剂是聚合物材料中应用最广泛的助剂之一,羟胺类抗氧剂同时具有捕获自由基和分解氢过氧化物的功能,其作为一种双功能型抗氧剂,在聚合物材料的加工和使用过程中已经得到了应用。简述了羟胺类抗氧剂的结构,详细介绍了羟胺类抗氧剂抗氧化作用的机理,在结构和作用机理的基础上对影响该类抗氧剂抗氧化效率的因素进行分析,着重阐述了次级氮氧自由基、取代基及取代烷基链长度对其抗氧化效率的影响。此外,介绍了常用羟胺类抗氧剂(烷基羟胺类、苄基羟胺类以及环状羟胺类等)的开发应用现状。最后,提出羟胺类抗氧剂未来的发展方向应致力于优化合成工艺,开发多元复配体系和多功能型羟胺类抗氧剂,实现抗氧剂的高效利用。

Antioxidants are one of the most widely used additives in polymer materials.Hydroxylamine antioxidants have the functions of trapping free radicals and decomgenerating hydroperoxide at the same time.As a kind of dual-function antioxidant,they have been applied in the processing and use of polymer materials.This article briefly describes the structure of hydroxylamine antioxidants,introduces the mechanism of antioxidant action of hydroxylamine antioxidants in detail,analyzes the factors affecting the antioxidant efficiency of hydroxylamine antioxidants based on the structure and mechanism,and focuses on the effects of secondary nitrogen oxide radicals,substituents and substitutive alkyl chain length on their antioxidant efficiency.In addition,the development and application of several hydroxylamine antioxidants,including alkyl hydroxylamine,benzyl hydroxylamine and cyclic hydroxylamine,were introduced.Finally,it is pointed out that the future development direction of hydroxylamine antioxidants should focus on optimizing the synthesis process,developing multi-compound system and multi-functional hydroxylamine antioxidants,and realizing the efficient utilization of one dose.