【摘要】 不同金属,特别是过渡金属化合物对聚烯烃的光降解有较复杂的影响,某些可敏化聚合物光氧化,而另一些却使聚合物光稳定。促使引发聚烯烃光降解的主要光引发基团氢过氧化物究竟是按自由基式分解还是按非自由基式分解,或捕获产生自由基的因素,决定了金属化合物的光敏化或光稳定作用。本文主要综述了钛、铁、铜、镍、锌等金属化合物对聚烯烃光降解的影响。更多还原

【Abstract】 Various function of metal compounds,especially transition-metal compounds,is found during the photooxidation of polyolefins.Polymers are photosensitizedby some of them and photostabilized by the others.It depends on the course,in which hydroperoxide,a primary photosensitive group inducing the photode-gradation of polyolefins,either is degraded by radical mode or non-radicalmode or traps the formed radicals.In this paper the effect of Ti,Fe,Cu,Niand Zn compounds on the photodegradation of polyolefins was summarized.更多还原