摘要
本文用IR、UV、SEM等方法,研究了双功能基受阻胺光稳定剂——三(1,2,2,6,6-五甲基-4-哌啶基)亚磷酸酯(GW-540),与紫外线吸收剂UV-531、UV-327并用时对聚丙烯的防光作用,结果表明:GW-540-UV-531并用体系有良好的防光作用,呈强的协同效应;GW-540-UV-327并用体系呈弱的对抗作用。结果还表明:GW-540对531和327的光分解均有保护作用.电镜研究表明,加入GW-540后,使UV-327在聚丙烯中分散更不均匀,从而影响其效率的发挥。文中提出了两个体系的协同和对抗作用机理。
The photoprotecting action of combination of GW-540 (tri-1,2,2,6,6-penta-methyl-4-piperidinyl phosphite) and two UV absorbers (UV-531,UV-327) for polypropylene was studied by IR.,UV-spectrum,SEM.The results showed that the combination of GW-540 and UV-531 possess a good photoprotecting effectiveness,appears strong synergism,and the combination of GW-540 and UV-327 appears a weak antagonism.The results of UV-spectrum showed that GW-540 can protect both UV-531 and UV-327 against photolysis.The results of SEM showed that the more non-uniform dispersion of UV-327 in polypropylene matrix had been formed when GW-540 was added in.The mechanisms of synergism (GW-540----UV-531) and antagonism (GW-540----UV327) were proposed.
出处
《感光科学与光化学》
CSCD
1990年第1期14-21,共8页
Photographic Science and Photochemistry
基金
国家自然科学基金
关键词
受阻胺
光稳定剂
聚丙烯
紫外吸收
hindered amine light stabilizer,polypropylene,synergism of additives,piperidine stabilizer,UV-absorbers
