Issue 3, 2011

Bulk ring-opening polymerization (ROP) of L-lactide catalyzed by Ni(ii) and Ni(ii)-Sm(iii) complexes based on a salen-type schiff-base ligand

Abstract

A monometallic (Ni2+, 1) and a bimetallic (Ni2+-Sm3+, 2) complexes based on the Salen-type Schiff-base ligand H22L (H22L = N,N′-bis(3-methoxysalicylidene)ethylene-1,2-diamine) were synthesized and characterized by FT-IR, ESI-MS and X-ray crystallography. The catalysis results showed that the two complexes with different active species, could efficiently catalyze the bulk solvent-free melt ring-opening polymerization (ROP) of L-lactide with moderate molecular weights and narrow molecular weight distributions. Especially, for the bimetallic complex 2, the involvement of rare ions effectively passivated the catalytic behavior on the ROP of L-lactide, while was in favor of the increase of polymeric molecular weights (Mn) and the polymerization controllability.

Graphical abstract: Bulk ring-opening polymerization (ROP) of L-lactide catalyzed by Ni(ii) and Ni(ii)-Sm(iii) complexes based on a salen-type schiff-base ligand

Supplementary files

Article information

Article type
Paper
Submitted
24 Nov 2010
Accepted
25 Nov 2010
First published
22 Dec 2010

Polym. Chem., 2011,2, 659-664

Bulk ring-opening polymerization (ROP) of L-lactide catalyzed by Ni(II) and Ni(II)-Sm(III) complexes based on a salen-type schiff-base ligand

G. Xiao, B. Yan, R. Ma, W. J. Jin, X. Q. Lü, L. Q. Ding, C. Zeng, L. L. Chen and F. Bao, Polym. Chem., 2011, 2, 659 DOI: 10.1039/C0PY00385A

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