近年来,人们对四甲基哌啶型受阻胺光稳定剂的稳定机理开展了深入研究,已提出受阻胺的光稳定机理主要包括捕获活性自由基;分解氢过氧化物(ROOH)以及猝灭单线氧和激发态分子三种作用,但对受阻胺的另一类重要衍生物——含五甲基哌啶基的稳定剂很少研 In recent years, the stability mechanism of tetramethylpiperidine hindered amine light stabilizers has been studied in depth. It has been proposed that the photostabilization mechanism of hindered amines mainly includes the capture of active radicals, the decomposition of hydroperoxides (ROOH) and the quenching Singlet oxygen and excited state molecules three kinds of role, but another important class of hindered amine derivatives - pentamethyl piperidine-based stabilizer rarely