引言
老化 稳定剂 是用于减缓或防止加工和使用寿命期间由热、氧、光、臭氧、湿气及相关环境应力引起的降解的 聚合物添加剂。在塑料实践中，该术语通常涵盖抗氧化体系、热稳定剂、光稳定剂 以及臭氧防护配方，这些配方可在延长使用寿命的同时保持机械性能、颜色和外观。
这些 添加剂 是塑料价值链的核心，因为大多数聚合物在熔融加工、储存和最终使用过程中都会经历热氧化、光氧化或水解老化的某种组合。其化学性质高度针对具体应用：聚烯烃通常依赖 酚类抗氧化剂 和亚磷酸酯，户外产品经常使用 紫外线吸收剂 和受阻胺 光稳定剂，而某些工程聚合物则需要专门体系来抵抗长期热或水解。
历史与发展
老化 稳定剂 的发展紧随聚合物的工业化进程，因为制造商认识到许多塑料在没有保护的情况下反应性过强，无法经受加工和长期使用。早期稳定策略侧重于简单的 抗氧化剂 和耐热配方，而后代产品则添加了更复杂的 光稳定剂、协同混合物以及针对苛刻应用的金属钝化体系。
一个重大转折点是从单一组分防护转向稳定剂组合，其中初级和次级 抗氧化剂、紫外线吸收剂 和 HALS 相结合，以同时针对不同的降解途径。这种方法至今仍占主导地位，因为聚合物老化通常是多因素的，而非由单一机制驱动。
化学结构与关键性能（技术概览）
老化 稳定剂 并不构成单一化学家族；它们是按性能而非结构定义的功能类别。塑料中使用的<|eos|>
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