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本工作测定了一系列稳定氟氧自由基(>N—O·)化合物及一些受阻胺光稳定剂对单重态氧(~1O_2)的猝灭速率常数(k_q请下载后查看，本文暂不支持在线获取查看简介。1O_2),发现不同结构的>N—O·对~1O_2的猝灭能力很接近,但它们对聚丙烯(PP)膜的光稳定作用却相差很大。四甲基哌啶醇(TMP)及其衍生物对~1O_2的猝灭能力远不如相应的五甲基哌啶醇(PMP)及其衍生物,但前者对PP的光稳定能力却胜于后者。这说明在对聚合物的光稳定作用中,>N—O·和受阻胺光稳定剂对~1O_2的粹灭作用不占重要地位,也说明~1O_2在PP的光氧化过程中很可能不是主要因素。
In this work, the quenching rate constants of singlet oxygen (~ 1O_2) of a series of stable oxyfluoride free radicals (> N-O ·) compounds and some hindered amine light stabilizers were determined. Supports the online access for review .1O_2). It was found that the quenching capacities of> N-O · on ~ 1O_2 for different structures are similar, but their photostabilizing effects on polypropylene (PP) films are quite different. Tetramethylpiperidinol (TMP) and its derivatives have far less quenching capacity for ~ 1O 2 than the corresponding pentamethylpiperidinol (PMP) and its derivatives, but the former has more light-stabilizing ability than PP By. This shows that in the light-stability of the polymer,> N-O · and hindered amine light stabilizer on ~ 1O 2 extinction is not important, also shows ~ 1O 2 in the PP photooxidation process is likely to not be the main factor.