Development of effective glycolysis process for chemical recycling of PET derivatives = Development of effective glycolysis process for chemical recycling of PET derivatives

다국어 초록 (Multilingual Abstract)

PET-G - a non-crystalline terephthalate copolymer containing both CHDM (1,4-cyclohexanedimethanol) and EG (ethylene glycol) units in the chain- has been used widely in many recent decades due to its better excellent optical, chemical and mechanical properties than that of PET (poly ethylene terephthalate). In this study, we investigated the improved catalyst systems on glycolysis PCT, a chemical recycling of the polymer, by studying the efficiency of the catalysts on the model transesterifications between monomers (BHCHT) and DEG went when each catalyst was applied. BHCHT (bis (4-hydroxymethyl)cyclohexylmethyl terephthalate)) was prepared for investigating the transesterifying catalytic ability and its structure were analyzed by ¹H-NMR. The efficiency catalysts were obtained by monitoring the reaction rate of the model transesterifications and real polymer glycolysis. The co-catalyst of Zinc acetate and NaOEt with the molar ratio of 1:5 performed the best catalytic efficiency in comparison with zinc acetate, zinc methoxide, sodium ethoxide in PET-G glycolysis.