Structure–property relationships: phenolic antioxidants with high efficiency and low colour contribution
Structure–property relationships: phenolic antioxidants with high efficiency and low colour contribution
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结构-性能关系：高效、低色度的酚类抗氧化剂
DOI：
10.1016/s0141-3910(02)00115-5
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发表时间：
2001
影响因子：
5.9
通讯作者：
J. Zenner
中科院分区：
文献类型：
--
作者：
I. Vulić;Giacomo Vitarelli;J. Zenner
抗氧化剂可以分为两大类，主要和次要，这取决于它们的作用模式。最广泛使用的主抗氧化剂是受阻酚。酚类抗氧化剂传统上基于2，6-二叔丁基-4-甲基苯酚（BHT）。该官能部分已被并入较大的分子中，从而提供具有较低挥发性或较大聚合物相容性的产物。最近，已经引入了在苯酚的空间位阻以及多个苯酚官能团连接以形成更大分子的方式方面变化的分子。这导致了具有较低颜色贡献的结构。令人惊讶的是，在某些情况下，这些分子相对于具有类似酚/分子量比的其他抗氧化剂显示出更高水平的功效。这包括与辅助抗氧化剂的协同作用的增强水平。尝试将这些分子的结构特征与增强的性能和/或较低的颜色相关联。
Antioxidants can be divided into two broad classes, primary and secondary, depending upon their mode of action. The most broadly used primary antioxidants are hindered phenols. Phenolic antioxidants have traditionally been based on 2,6‐di‐t‐butyl‐4‐methylphenol (BHT). This functional moiety has been incorporated into larger molecules affording products with lower volatility or greater polymer compatibility. More recently, molecules have been introduced which vary in steric hindrance about the phenol and also the way in which multiple phenol functional groups are linked to form larger molecules. This has led to structures which have lower color contribution. Surprisingly, in some cases these molecules have shown higher levels of efficacy relative to other antioxidants with similar phenol/molecular weight ratios. This has included enhanced levels of synergism with secondary antioxidants. An attempt is made to correlate structural features of these molecules to the enhanced performance and/or lower color.