Identification of Ethylene-Octene Copolymer by Pyrolysis GC-MS

A new method for the identification of ethylene-octene copolymer and polyethlene by pyrolysis GC-MS,which could not be distinguished before,was established.The major pyrolysis products were C 6 -C 25 olefine and alkane.The results showed that the chemical constituents of pyrolysis products were similar,but their relative contents were different.The content of octene in ethylene-octene copolymer was higher than that in polyethylene.The octene peak was used as the characteristic peak to identify ethylene-octene copolymer,and its relative content was used for the determination of octene proportion in the copolymer.This method is rapid,simple and has been applied in the identification of ethylene-octene copolymer and polyethene.