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Phosphazene Bases: A New Category of Organocatalysts for the Living Ring-Opening Polymerization of Cyclic Esters

Zhang, Lei, Nederberg, Fredrik, Pratt, Russell C., Waymouth, Robert M., Hedrick, James L., Wade, Charles G.·2007·Macromolecules

Abstract

We demonstrate that phosphazene bases, such as 2- tert -butylimino-2-diethylamino-1,3-dimethylperhydro-1,3,2-diazaphosphorine (BEMP) and N ‘- tert -butyl- N,N, N ‘, N ‘, N ‘ ‘, N ‘ ‘-hexamethylphosphorimidic triamide (P 1 - t -Bu), are active organocatalysts for the living ring-opening polymerization (ROP) of cyclic esters. Polyesters prepared through this organocatalytic route possess predictable molecular weights, narrow polydispersities, and high end-group fidelity. Mechanistic studies suggest that the intermolecular hydrogen bonding of the alcohol initiator to phosphazene bases activates the alcohol for ROP of cyclic esters.

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Cited by

Metadata

Authors
Zhang, L., Nederberg, F., Pratt, R. C., Waymouth, R. M., Hedrick, J. L., & Wade, C. G.
Venue
Macromolecules
Published
2007-05-19
Volume
40
Issue
12
Pages
4154-4158
ISSN
  • 0024-9297 (ISSN-L)
  • 1520-5835
OpenAlex
W1994372874
Cited by
273
References
2
FWCI
5.62
Type
journal article
Language
en
Open access
closed

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