Poly α-olefin,used as the drag reducing agent on the crude oil transportation,was analyzed by pyrolysis/gas chromatography-mass spectrometry(PY/GC-MS).Three polyolefin samples of polydecene,polyoctene and the copolymer of decene and octane,were analyzed.The samples were analyzed by increasing pyrolysis temperatures from 500 to 800 ℃.The result showed that the optimal pyrolysis temperature was 600 ℃.2-Methyl-decene and 2-methyl-pentadecene was selected as the characteristic pyrolysates for identification polydecene and polyoctene,respectively.The quantitative method of the copolymer was also discussed.Height peak of the characteristic pyrolysate was used to calculate the mass rate of the two monomers in the copolymers.The error of the method was-4.08%.
