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Synthesis of biodegradable and biorenewable polylactides initiated by aluminum complexes bearing m-xylylenediamine derivatives via the ring-opening polymerization of lactides

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Abstract

A series of aluminum complexes bearing [ONNO]-type ligands were prepared using m-xylylenediamine and modified salicylaldehyde. These complexes were characterized by NMR spectroscopy and elemental analysis. These complexes were employed in L-lactide and rac-lactide polymerization. Upon activation with isopropanol, complex 3 showed the highest activity (monomer conversion 97.4%) amid these aluminum complexes for the ring-opening polymerization of L-lactide and complex 2 showed the highest stereoselectivity for the ring-opening polymerization of rac-lactide providing isotactic polylactide (PLA) with a Pm of 0.70. The polymerization kinetics utilizing 2 as an initiator was researched in detail. The kinetics of the polymerization data revealed that the rate of polymerization was first-order with respect to the monomer and the initiator. There was a linear relationship between the L-lactide conversion and the number-average molecular weight of PLA.

Graphical abstract: Synthesis of biodegradable and biorenewable polylactides initiated by aluminum complexes bearing m-xylylenediamine derivatives via the ring-opening polymerization of lactides

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Publication details

The article was received on 11 Mar 2019, accepted on 03 Apr 2019 and first published on 03 Apr 2019


Article type: Paper
DOI: 10.1039/C9NJ01268K
Citation: New J. Chem., 2019, Advance Article

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    Synthesis of biodegradable and biorenewable polylactides initiated by aluminum complexes bearing m-xylylenediamine derivatives via the ring-opening polymerization of lactides

    D. Li, B. Gao and Q. Duan, New J. Chem., 2019, Advance Article , DOI: 10.1039/C9NJ01268K

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