ArticlePolymers2026
Selective Upcycling of Waste PET into Di(2-ethylhexyl) Terephthalate via a Hybrid Organometallic Catalytic Strategy for PVC Plasticizer Applications.
Article in Polymers, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The selective conversion of post-consumer polyethylene terephthalate (PET) into value-added plasticizers offers a promising pathway for advancing polymer circularity within the scope of the circular economy approach. Herein, waste PET bottles were directly upcycled into di(2-ethylhexyl) terephthalate (DOTP) via degradative alcoholysis/transesterification with 2-ethylhexanol using four organometallic catalyst systems: butylstannic acid (F), monobutyltin tris(2-ethylhexanoate) (TK), titanium tetraisopropoxide (T), and a hybrid organotin-titanium system (TKT). PET conversion ranged from 84 to 94%, with the T catalyst affording the highest conversion (94%). Notably, the hybrid TKT catalyst provided the most favorable overall performance, achieving an 81% isolated yield and 85.4% selectivity. GC-FID analysis revealed that DOTP-TKT achieved a 92.0% chromatographic area, while GPC confirmed that this product had the lowest proportion of residual oligomers (15.13%) among all PET-derived samples. FTIR and
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