双功能受阻胺与紫外线吸收剂并用的协同效应研究

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。

STUDY ON THE SYNERGISTIC EFFECT OF BISFUNCTIONAL HINDERED AMINE WITH UV-ABSORBERS

The synergistic effect of bisfunctional hindered amine Tinuvin-1442-(4'-hydroxyl-3'5'-bis-tert-butyl)benzyl-2-n-butyl malonate bis-penta-mnhyl piperidinyl] and UV-absorbers (UV-531,.UV-327) have been examined by IR,UV-spectra,ESR,and TLC for the light stabilization of polypropylene (PP).The results show that the combination of Tinuvin-144 and UV-531 or UV-327 appears a synergistic effect,and Tinupin-144 and the UV absorbers can be protected each other against photolysis of them.In addition,the results also show that there are not chemical reaction accelerating loss of additives between hindered amine and absorbers within induction period.The mechanism of synergistic action has been proposed.