2009•Materials science forumOpen access

Photo-Oxidative Degradation of Metallocene Linear Low-Density Polyethylene

Fu Chen Bai, Chun Xiao Zhang, Xiyao Zhang, Jian Liu, Wei Tian

Abstract

Films of linear-low density polyethylenes, made from metallocene catalyst and Ziegler-Natta catalyst , were exposed to accelerate photo-oxidation conditions. The investigations were focused on the changes of the physical and chemical structures and elongation at break occurring in the photo-oxidation process. The results showed that ethylene-hexene m-LLDPE was more favorer to photo-oxidize than ethylene-octene LLDPE. The other two ethylene-ocetene m-LLDPEs were comparable to LLDPE with the same comonomer. The oxidation rate of LDPE is slower than those of all the LLDPEs.

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Key concepts: Linear low-density polyethylene, Comonomer, Low-density polyethylene, Metallocene, Materials science, Ethylene, Polyethylene, Post-metallocene catalyst