【摘要】 本文采用IR、UV、SEM等实验方法,研究了高分子受阻胺PDS与紫外吸收剂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)并用对聚丙烯薄膜的光防护作用。实验表明,PDS与UV-531并用有较好的协同效应。这种协同效应被证明主要是PDS对:UV-531的光氧分解有抑制作用所致。PDS与UV-327并用有弱的反协同作用。这种作用被证实是PDS在聚丙烯中的分相作用导致UV-327分散不均所致。实验还发现,PDS对UV-327的光氧分解同样具有抑制作用。并提出了在二种体系中协同与反协同的作用机理。更多还原

【Abstract】 The photoprotecting behaviour of PDS and two UV-absorbers for PP film has been studied by determination of infrared and ultraviolet spectroscopy and scanning electron microscopy. The results have shown that PDS synergises effectively with 2-hydroxy-4-n-octyloxybenzopheno-ne (UV-531) and antagonises weakly with 2-(2-hydroxy-3, 5-di-tert-butyl-phenyl) -5-chloroben-zotriazole (UV-327). It has also been shown that PDS had protected them from photolysis. In addition, it was found that a nonuniform dispersion of UV-327 was formed in PP matrix in presence of PDS. The mechanisms of the synergistic and antagonistic effects under these condition have been proposed.更多还原