Poly(ethylene terephthalate) waste materials were depolymerized by ethylene glycol (EG), diethylene glycol (DEG), and propylene glycol (PG) in the presence of a novel catalytic system: titanium (IV)‐phosphate. The new catalyst was synthesized through a reaction of TiCl 4 with triethyl phosphate (C 2 H 5 O) 3 P(O). It was found that the depolymerization of poly(ethylene terephthalate) fiber proceeds faster in the presence of titanium (IV)‐phosphate compared with compounds traditionally used in this process like Zn(OOCCH 3 ) 2 . The oligomer distribution in the glycolysis products was studied by size‐exclusion chromatography.
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Troev et al. (2003) studied this question.
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