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Effect of the addition of salt to Pickering emulsion polymerizations using polymeric nanogels as stabilizers
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Lotierzo, Andrea, Meaney, Shane P. and Bon, Stefan Antonius Franciscus (2019) Effect of the addition of salt to Pickering emulsion polymerizations using polymeric nanogels as stabilizers. Polymer Chemistry . doi:10.1039/C9PY01240K (In Press)
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Official URL: http://dx.doi.org/10.1039/C9PY01240K
Abstract
Nanogels made from crosslinked block copolymer micelles are used as stabilizers in the Pickering emulsion polymerization of styrene. The effect of the addition of salt, i.e. NaCl, on the emulsion polymerization is studied. It is shown that an increase in ionic strength of the dispersing medium in these polymerizations led to the formation of latexes of larger diameters. Along with an increase in size, the morphology of these polymer colloids changed from Janus to patchy with an increase in number of nanogels adsorbed on the polymer surface, as a function of the salt concentration in water. In particular, at the highest tested ionic strength, ca. 25 mM, fully armored polymeric particles surrounded by a dense layer of adsorbed stabilizing nanogels were formed. Kinetic studies carried out at varying NaCl concentrations suggested that particle formation in the reaction followed a combination of a coagulative nucleation mechanism, characterized by a clustering process of Janus precursors to form bigger aggregates, and droplet nucleation. Preliminary film formation studies on latexes made with n-butyl acrylate as a comonomer indicated the potential of this technique for the production of coherent polymer films which included a substructure of functional nanogels.
| Item Type: | Journal Article | |||||||||
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| Subjects: | Q Science > QD Chemistry Q Science > QP Physiology T Technology > TP Chemical technology |
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| Divisions: | Faculty of Science > Chemistry | |||||||||
| Library of Congress Subject Headings (LCSH): | Emulsion polymerization , Polymer colloids, Nanogels | |||||||||
| Journal or Publication Title: | Polymer Chemistry | |||||||||
| Publisher: | Royal Society of Chemistry | |||||||||
| ISSN: | 1759-9954 | |||||||||
| Official Date: | 11 November 2019 | |||||||||
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| Date of first compliant deposit: | 2 December 2019 | |||||||||
| DOI: | 10.1039/C9PY01240K | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | In Press | |||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||
| RIOXX Funder/Project Grant: |
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