STUDY ON THE COMBINATION EFFECT OF 1,2,2,6,6-PENT-AMETHYL-4-HYDROXY-PIPERIDINE WITH SEVERAL UV ABSORBERS AND QUENCHER ON THE PHOTO-STABILITY OF POLYPROPYLENE FILMS
1,2,2,6,6-五甲基哌啶醇与紫外吸收剂和猝灭剂在对聚丙烯膜光稳定作用中并用效应的研究

The combination effects of 1,2,2,6,6-pentamethyl-4-hydroxy-piperidine (PMP) with several UV absorbers and quencher during the photo-oxidation of polypropylene film have been examined. It was found that PMP gives a synergistic effect with 2-hydroxy-4-n-octy loxy-benzophenone (UV-531), an additive effect with nickel (3,5-di-tertbutyl-4-hydroxy ben-zylphosphonate monoethylate) (Irgastab 2002) and a weak antagonistic effect with 2-(2'-hydroxy-3', 5'-di-tert-butyl-phenyl)-5-chlorobenzotriazole (UV-327). The difference be-bween the combination effects of tetramethyl piperidine derivatives and pentamethyl pipe-ridinol with these UV absorbers and quencher was compared.