Effects of Ultraviolet (UV) on Degradation of Irgafos 168 and Migration of Its Degradation Products from Polypropylene Films

• DOI: 10.1021/acs.jafc.6b03018
• Publication Date: 2016-09-23T18:49:05Z
• Authors: Yueping Yang; Changying Hu; Huaining Zhong; Xi Chen; Rujia Chen; Kit L. Yam
• Keywords: Degradation; Polypropylene; Ultraviolet; Sunlight; Ultraviolet irradiation; Ultraviolet light; Photodegradation

The effects of ultraviolet (UV) irradiation on the degradation Irgafos 168 and migration its two products, 2,4-di-tert-butylphenol tris(2,4-di-tert-butylphenyl)phosphate, from polypropylene (PP) were investigated. A blown film machine was used to extrude PP films containing 168, stored in dark for 45 days, UV treatments sunlight exposure applied films, GC-MS studies. Extrusion, storage, treatments, significantly affected concentrations products. 2,4-Di-tert-butylphenol major product produced by irradiation, but tris(2,4-di-tert-butylphenyl)phosphate extrusion, exposure. products have no or little health risk, because study threshold toxicological concern (TTC) analysis show that experimental maximum are only 2 53% theoretical amounts, respectively.