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Poly(ethylene terephthalate)–poly(lactic acid) (PET–PLLA) copolyesters were synthesized by the melt reaction of bis(2-hydroxyethyl terephthalate) (BHET) with l-lactic acid oligomers (OLLA) in the presence of SnCl 2 , H 2 O–p-toluene sulfonic acid, H 2 O catalytic system. The 1 H and 13 C NMR studies confirm the incorporation of lactate units in PET chains after...
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