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Issue 8, 2014
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Optimal ionic strength for nonionically initiated polymerization

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Abstract

Surfactant-free emulsion polymerization involving a nonionic, and hence uncharged initiator presents a new approach towards environmentally friendly procedures to synthesize latex particles. Under optimal solvent conditions, notably pH and ionic strength, the latex particles are stabilized by the natural development of ionic charge at the surface of the particles. We emphasize that the present process does not at all involve the addition of stabilizers such as surfactants or the creation of surface-active species from ionic initiators. The width of the size distribution is found to vary strongly with experimental conditions, notably the ionic strength and to a much lesser extent pH. The phenomenon is explained by a critical ionic strength dependence of the aggregation of the just nucleated primary particles into larger secondary particles, the so-called “coagulative nucleation” step.

Graphical abstract: Optimal ionic strength for nonionically initiated polymerization

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Publication details

The article was received on 23 Jul 2013, accepted on 27 Nov 2013 and first published on 02 Dec 2013


Article type: Paper
DOI: 10.1039/C3SM51998H
Citation: Soft Matter, 2014,10, 1151-1154
  • Open access: Creative Commons BY license
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    Optimal ionic strength for nonionically initiated polymerization

    M. E. Dobrowolska and G. J. M. Koper, Soft Matter, 2014, 10, 1151
    DOI: 10.1039/C3SM51998H

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