Abstract
PET wastes were depolymerized by glycolysis at different weight ratios of propylene glycol at 200°C and in the presence of zinc acetate as catalyst. The glycolyzed products were identified by GPC, IR and MS techniques. It was found that the glycolyzed products consisted mainly of dimer and trimer of bis-hydroxy propyl terephthalate and no monomer was detected. It was clear that the dimer/trimer ratio increased with increasing ratio of PG from 40-60 wt%, indicating more extent of depolymerization.
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