Salen-like Chromium and Aluminum Complexes as Catalysts in the Copolymerization of Epoxides with Cyclic Anhydrides for the Synthesis of Polyesters

Autor:	Mazzeo, Federica Santulli, Ilaria Grimaldi, Daniela Pappalardo, Marina Lamberti, Mina
Jazyk:	angličtina
Rok vydání:	2023
Předmět:	aluminum catalysts block copolymers chromium(III) catalysts polyesters ring opening copolymerization switch catalysis
Zdroj:	International Journal of Molecular Sciences; Volume 24; Issue 12; Pages: 10052
ISSN:	1422-0067
DOI:	10.3390/ijms241210052
Popis:	Chromium and aluminum complexes bearing salalen ligands were explored as catalysts for the ring-opening copolymerization (ROCOP) of succinic (SA), maleic (MA), and phthalic (PA) anhydrides with several epoxides: cyclohexene oxide (CHO), propylene oxide (PO), and limonene oxide (LO). Their behavior was compared with that of traditional salen chromium complexes. A completely alternating enchainment of monomers to provide pure polyesters was achieved with all the catalysts when used in combination with 4-(dimethylamino)pyridine (DMAP) as the cocatalyst. Poly(propylene maleate-block-polyglycolide), a diblock polyester with a precise composition, was obtained by switch catalysis, in which the same catalyst was able to combine the ROCOP of propylene oxide and maleic anhydride with the ring-opening polymerization (ROP) of glycolide (GA) through a one-pot procedure, starting from an initial mixture of the three different monomers.
Databáze:	OpenAIRE
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