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本文用IR、UV、ESR、TLC等方法研究了新型的双功能受阻胺光稳定剂,Tinuvin-144 [2-(4′-羟基-3′,5′-二叔丁基)苄基-2-正丁基丙二酸五甲基哌啶醇酯]与紫外线吸收剂,UV-531(2-羟基-4-正辛氧基二苯甲酮)和UV-327(2-[2′-羟基-3′,5′-二叔丁基]-5-氯 代苯并三唑)并用体系对聚丙烯光稳定化的并用效应。结果表明,Tinuvin-144与UV-531,UV-327并用时均具有良好的协同效应,144对531,327或531,327对144的光分解均具有相互的保护作用。结果还表明,144与531或327无论在模拟体系或聚丙烯中,在诱导期内均不存在促使他们消耗的化学反应,提出了协同作用的机理。
In this paper, a new type of bifunctional hindered amine light stabilizer, Tinuvin-144 [2- (4’-hydroxy-3 ’, 5’-di-t- butyl) benzyl-2 -pentamethylpiperidino-n-butylmalonate] with UV absorbers, UV-531 (2-hydroxy-4-n-octoxybenzophenone) Hydroxy-3 ’, 5’-di-tert-butyl] -5-chlorobenzotriazole) combined effect of light stabilizing polypropylene system. The results showed that Tinuvin-144 had good synergistic effect with UV-531 and UV-327, and 144 pairs of 531,327 or 531,327 had the same protective effect on the photodegradation of 144. The results also show that, 144 and 531 or 327 both in the simulation system or polypropylene in the induction period to promote their consumption of chemical reactions, put forward the mechanism of synergy.