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Precise Block-Copolymers by Efficient Coupling of End-Functionalized Polymers Using Phosgene

✍ Scribed by Irina Cotiuga; Francesco Picchioni; Uday S. Agarwal; Bastiaan B. P. Staal; Jef A. J. M. Vekemans; Piet J. Lemstra

Book ID: 102490617
Publisher: John Wiley and Sons
Year: 2006
Tongue: English
Weight: 118 KB
Volume: 27
Category: Article
ISSN: 1022-1336
DOI: 10.1002/marc.200500744

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✦ Synopsis

Abstract

Summary: We report the synthesis of well‐defined block copolymers by covalent coupling of hydroxy end‐functionalized polymers. Using the high volatility of the coupling agent phosgene as compared to the solvent, very high conversion (up to 96%) is obtained in a one‐pot reaction with as little as 10^−5^ moles of each of the reacting polymers, even without prior purification of the as‐received reagents. This has potential as an alternative to the currently practiced method of sequential living polymerization of constituent monomers, with the added advantage of direct knowledge and control over the length distribution of each block.

Coupling of end‐functionalized polymers using phosgene to form block copolymers of controlled composition.

magnified imageCoupling of end‐functionalized polymers using phosgene to form block copolymers of controlled composition.

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