Analysis of pyrolysis products formed from ethylene-tetrafluoroethylene heterosequences of poly(ethylene-co-tetrafluoroethylene)

► Poly(ethylene-co-tetrafluoroethylene) (PETFE) was pyrolyzed at 700-900 °C. ► Pyrolysis products formed from the ethylene-tetrafluoroethylene heterosequences were analyzed using GC/MS. ► Formation mechanisms of the major pyrolysis products were proposed. ► Order of the relative abundances of the major pyrolysis products was explained with the difference in bond energies of CH2-CH2, CF2-CH2, and CF2-CF2.