Controlled stereoselective polymerization of lactide monomers by group 4 metal initiators that contain an (OSSO)-type tetradentate bis(phenolate) ligand

Jean Charles Buffet; Ashley N. Martin; Moshe Kol; Jun Okuda

doi:10.1039/c1py00266j

Controlled stereoselective polymerization of lactide monomers by group 4 metal initiators that contain an (OSSO)-type tetradentate bis(phenolate) ligand

Jean Charles Buffet, Ashley N. Martin, Moshe Kol, Jun Okuda

School of Chemistry

Tel Aviv University

Research output: Contribution to journal › Article › peer-review

Abstract

Group 4 metal complexes Zr-1 to Zr-4, Ti-4 and Ti-4a that contain an (OSSO)-type tetradentate bis(phenolate) ligand were found to initiate the ring-opening polymerization of meso-, rac-, and l-lactides in toluene solution. The polymerizations were controlled with initiator efficiency values around one and gave polymers with low polydispersity (M_w/M_n < 1.2). The polylactides were atactic when rac-lactide was used as the monomer and heterotactic biased when meso-lactide was used. Kinetic measurements showed that meso-lactide was polymerized generally faster than rac- and l-lactide.

Original language	English
Pages (from-to)	2378-2384
Number of pages	7
Journal	Polymer Chemistry
Volume	2
Issue number	10
DOIs	https://doi.org/10.1039/c1py00266j
State	Published - Oct 2011

All Science Journal Classification (ASJC) codes

Bioengineering
Biochemistry
Polymers and Plastics
Organic Chemistry

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title = "Controlled stereoselective polymerization of lactide monomers by group 4 metal initiators that contain an (OSSO)-type tetradentate bis(phenolate) ligand",

abstract = "Group 4 metal complexes Zr-1 to Zr-4, Ti-4 and Ti-4a that contain an (OSSO)-type tetradentate bis(phenolate) ligand were found to initiate the ring-opening polymerization of meso-, rac-, and l-lactides in toluene solution. The polymerizations were controlled with initiator efficiency values around one and gave polymers with low polydispersity (Mw/Mn < 1.2). The polylactides were atactic when rac-lactide was used as the monomer and heterotactic biased when meso-lactide was used. Kinetic measurements showed that meso-lactide was polymerized generally faster than rac- and l-lactide.",

author = "Buffet, {Jean Charles} and Martin, {Ashley N.} and Moshe Kol and Jun Okuda",

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doi = "10.1039/c1py00266j",

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T1 - Controlled stereoselective polymerization of lactide monomers by group 4 metal initiators that contain an (OSSO)-type tetradentate bis(phenolate) ligand

AU - Buffet, Jean Charles

AU - Martin, Ashley N.

AU - Kol, Moshe

AU - Okuda, Jun

PY - 2011/10

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N2 - Group 4 metal complexes Zr-1 to Zr-4, Ti-4 and Ti-4a that contain an (OSSO)-type tetradentate bis(phenolate) ligand were found to initiate the ring-opening polymerization of meso-, rac-, and l-lactides in toluene solution. The polymerizations were controlled with initiator efficiency values around one and gave polymers with low polydispersity (Mw/Mn < 1.2). The polylactides were atactic when rac-lactide was used as the monomer and heterotactic biased when meso-lactide was used. Kinetic measurements showed that meso-lactide was polymerized generally faster than rac- and l-lactide.

AB - Group 4 metal complexes Zr-1 to Zr-4, Ti-4 and Ti-4a that contain an (OSSO)-type tetradentate bis(phenolate) ligand were found to initiate the ring-opening polymerization of meso-, rac-, and l-lactides in toluene solution. The polymerizations were controlled with initiator efficiency values around one and gave polymers with low polydispersity (Mw/Mn < 1.2). The polylactides were atactic when rac-lactide was used as the monomer and heterotactic biased when meso-lactide was used. Kinetic measurements showed that meso-lactide was polymerized generally faster than rac- and l-lactide.

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DO - 10.1039/c1py00266j

M3 - مقالة

SN - 1759-9954

VL - 2

SP - 2378

EP - 2384

JO - Polymer Chemistry

JF - Polymer Chemistry

IS - 10

ER -

Controlled stereoselective polymerization of lactide monomers by group 4 metal initiators that contain an (OSSO)-type tetradentate bis(phenolate) ligand

Abstract

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