The results showed that there was an inductive period during photodegradation , which was depended on antioxidant.The photosensitizer could accelerate the photodegradation after the inductive period.

• 研究结果表明,在聚乙烯光降解过程中存在诱导期,其长短主要决定于抗氧剂,而光敏剂则加速诱导期后的光降解。