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Issue 20, 2017
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A facile route towards PDMAEMA homopolymer amphiphiles

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Well-defined poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) has been modified at low degrees of quaternization of the tertiary amine groups using alkyl halides with long alkyl chains as the quaternization agents. The resulting PDMAEMA-co-PQDMAEMA copolymers were studied in aqueous solution using potentiometric titrations, turbidimetry, surface tensiometry, dynamic light scattering and zeta potential measurements. An increase of the hydrophilicity of the precursor polymer, leading to an increase or even elimination of the lower critical solution temperature (LCST) for the quaternized copolymers was found; this extended the temperature range of the stable polymer solution. At the same time, it was shown that the hydrophobic character of the polymer increases upon quaternization, leading to higher surface activity compared to the precursor PDMAEMA homopolymer, and, thus, to more effective polymeric surfactants. This contradiction in the copolymer behavior was attributed to the interplay between the polymer self-assembly in the aqueous medium and the polymer adsorption at the air/water interface, which dominate the cloud point and the surface properties, respectively.

Graphical abstract: A facile route towards PDMAEMA homopolymer amphiphiles

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The article was received on 21 Feb 2017, accepted on 29 Apr 2017 and first published on 03 May 2017

Article type: Paper
DOI: 10.1039/C7SM00365J
Citation: Soft Matter, 2017,13, 3777-3782
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    A facile route towards PDMAEMA homopolymer amphiphiles

    T. Manouras, E. Koufakis, S. H. Anastasiadis and M. Vamvakaki, Soft Matter, 2017, 13, 3777
    DOI: 10.1039/C7SM00365J

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