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Issue 12, 2006
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The pH-induced swelling and collapse of a polybase brush synthesized by atom transfer radical polymerization

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Abstract

We have used neutron reflectometry to characterize the swelling behaviour of brushes of poly[2-(diethyl amino)ethyl methacrylate], a polybase, as a function of pH. The brushes, synthesized by the “grafting from” method of atom transfer radical polymerization, were observed to approximately double their thickness in low pH solutions, although the pKa is shifted to a lower pH than in dilute solution. The composition–depth profile obtained from the reflectometry experiments for the swollen brushes reveals a region depleted in polymer between the substrate and the extended part of the brush.

Graphical abstract: The pH-induced swelling and collapse of a polybase brush synthesized by atom transfer radical polymerization

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Publication details

The article was received on 16 Aug 2006, accepted on 25 Sep 2006 and first published on 09 Oct 2006


Article type: Paper
DOI: 10.1039/B611847J
Citation: Soft Matter, 2006,2, 1076-1080
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    The pH-induced swelling and collapse of a polybase brush synthesized by atom transfer radical polymerization

    M. Geoghegan, L. Ruiz-Pérez, C. C. Dang, A. J. Parnell, S. J. Martin, J. R. Howse, R. A. L. Jones, R. Golestanian, P. D. Topham, C. J. Crook, A. J. Ryan, D. S. Sivia, J. R. P. Webster and A. Menelle, Soft Matter, 2006, 2, 1076
    DOI: 10.1039/B611847J

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