Depolymerization of polyethylene terephthalate (PET) in sub- and supercritical water was carried out in a batch autoclave(0.05L)under different conditions. Experiments researched the reaction temperature, reaction time, catalyst and other conditions affect on the depolymerization of PET and yield of the primary product of terephthalic acid (TPA) and ethylene glycol (EG) in detail. The depolymerization products were analyzed by Fourier-transform Infrared Spectroscopy (FT-IR), High Performance Liquid Chromato...