Synthesis of poly[dimethylsiloxane-block- oligo(ethylene glycol)methyl ether methacrylate]: an amphiphilic copolymer with a comb-like block

Kurjata, J. and Chojnowski, J. and Yeoh, C.T and Rossi, N.A.A. and Holder, S.J. (2004) Synthesis of poly[dimethylsiloxane-block- oligo(ethylene glycol)methyl ether methacrylate]: an amphiphilic copolymer with a comb-like block. Polymer, 45 (18). pp. 6111-6121. ISSN 0032-3861. (The full text of this publication is not available from this repository)

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Abstract

AB amphiphilic comb-like block copolymers of poly(oligo[ethylene glycol] methyl ether methacrylate) and polydimethylsiloxane were synthesised with a methodology based on atom transfer radical polymerization (ATRP). The anionic ring opening polymerisation of hexamethylcyclotrisiloxane followed by reaction with 3-(chlorodimethylsilyl) propyl 2-bromo-2-methylpropanoate propyldimethylchlorosilane gave suitable macroinitiators for the ATRP of oligo[ethylene glycol] methyl ether methacrylate. The latter synthetic procedure was optimised by performing a number of syntheses varying the reaction solvent, catalytic complex and the temperature used. Copolymers with relatively high polydispersity indices (Mw/Mn>1.3) could be synthesised at room temperature by employing a Cu(I)Br:N,N,N′,N′,N″-pentamethyldiethylenetriamine complex in n-propanol with Cu(II)Br. The optimum reaction conditions employed a Cu(I)Cl:N-(n-propyl)-2-pyridyl(methanimine) complex with an n-propanol/water mixture or toluene as solvent at 90 °C. This gave block copolymers of the desired molecular weights and polydispersity indices of less than 1.1. The block copolymers were characterised with 1H NMR and 13C NMR spectroscopy and size exclusion chromatography.

Item Type: Article
Additional information: 34 ELSEVIER SCI LTD
Uncontrolled keywords: Amphiphilic block copolymers; Poly(oligoethylene glycol methacrylate); Atom transfer radical polymerisation (ATRP)
Subjects: Q Science
Q Science > QD Chemistry
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences > Functional Materials Group
Depositing User: Sara Witchell
Date Deposited: 19 Dec 2007 18:34
Last Modified: 14 Jan 2010 14:00
Resource URI: http://kar.kent.ac.uk/id/eprint/883 (The current URI for this page, for reference purposes)
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