| 초록 |
Recently, poly (ethylene terephthalate) (PET) and its glycol-modified derivatives, such as poly (1,4-cyclohexylenedimethylene terephthalate) (PCT), poly (isosorbide terephthalate) (PIT) have been used widely due to their good thermal and mechanical properties. Besides, the demand for their chemical recycling is also rising. However, systematic studies on the glycolysis activity of PET derivatives have been limited. In our study, glycolysis of PET with diethylene glycol (DEG), 1,4-cyclohexanedimethanol (CHDM) and D-isosorbide (ISB) under catalytic conditions was investigated. ISB and CHDM showed low reactivity due to its unreactive structure. It was founded that the increased nucleophilicity of the alkoxide-combined zinc catalyst improved the reactivity of transesterification. The enhanced catalytic glycolysis condition was applied to the glycolysis of PCT; the reaction rate was three times higher than that with the conventional zinc acetate and the product was produced with 82% yield |
